Download Pig Dissection Lab3 Heart Kidney Lung

FETAL PIG DISSECTION - LAB # 3
HEAD REGION, ORGAN REMOVAL,
THE CIRCULATORY, EXCRETORY
AND RESPIRATORY ORGANS
PSSA Standards for Reading, Writing, Speaking, Listening, Science and Technology
ASRWSL 1.1F = Understand the meaning of and apply key vocabulary across the various subject areas.
ASRWSL 1.2A = Read and understand essential content of informational texts and documents in all
academic areas.
ASRWSL 1.6A = Listen to others.
ASRWSL 1.6D = Contribute to discussions.
ASRWSL 1.6E = Participate in small and large group discussions and presentations.
ASST 3.2 C = Apply the elements of scientific inquiry to solve problems.
ASST 3.3 A = Explain the structural and functional similarities and differences found among living things.
ASST 3.7 A = Identify and safely use a variety of tools, basic machines, materials and techniques to solve
problems and answer questions.
MATERIALS: scalpel
safety goggles / glasses
forceps (tweezers)
Fetal Pig Reference Diagram Booklet
scissors
lead & colored pencils
probe
bone cutters (needed to sever head)
pig
hand lens (needed for last step of lab)
dissection pan lined with paper toweling
1 rough draft diagram entitled: SALIVARY GLANDS – ORAL/BUCCAL CAVITY
1 rough draft diagram entitled: HEART – VENTRAL / DORSAL / INTERNAL VIEWS
1 rough draft diagram entitled: EXCRETORY AND RESPIRATORY STRUCTURES
GENERAL INFORMATION:
This lab is divided into the following four parts:
PART I = You are going to locate, draw and label several structures of the head region of
the fetal pig.
PART II = You are going to open the thoracic (chest) and abdominal cavities of the pig and
then locate the organs found in these cavities.
PART III = You are going to complete several tasks: remove the internal organs as one unit,
sever the head from the rest of the body, dispose of the body, separate the single
unit of organs into four parts, and skin the head.
PART IV = You are going to locate, draw, dissect and label the heart, lungs and kidneys.
The labeled, colored diagrams completed in PART I will be kept in your pig folder and turned in
with the next lab report (Lab #4).
The labeled, colored diagrams completed in PART IV will make up the lab report for this portion
of the fetal pig dissection.
PART I
Use the rough draft diagram entitled: SALIVARY GLANDS - ORAL / BUCCAL CAVITY.
Salivary Glands
REFER TO DIAGRAM # 12 in the Reference Diagram Booklet.
You are now going to locate two types of salivary gland in the fetal pig. They are the parotid and
submaxillary (also called mandibular) glands.
1). Turn the pig on her / his side so that you can see the masseter (cheek) muscle you exposed in
the last lab. You may have to remove some additional skin at this time, so that the glands are
completely exposed. The parotid gland is thin and "C" shaped. The surface of this gland has a
“curly” appearance (similar to the top of raw broccoli in texture). It is located below the ear and
continues to the throat area. The submaxillary gland is anterior to the parotid gland. It is roughly
oval in shape, looks like a bean and lies along the curve of the jaw. You will only see the tip of this
gland. Both glands are posterior to the masseter muscle.
2). On the picture entitled SALIVARY GLANDS, draw and label the masseter muscle, the parotid
gland and the submaxillary gland. Include the fibers in the masseter muscle.
Oral / Buccal Cavity
REFER TO DIAGRAM # 13 in the Reference Diagram Booklet.
3).With your scissors, cut through the corner of the mouth - on each side – toward the ear. You
will completely cut through the jaw. It will crunch when you do this. When these cuts are
complete, the jaw will drop and expose the entire tongue and epiglottis. Refer to the diagram
booklet for the location of these structures. This will allow you to examine the interior of the oral
cavity. Now locate the structures listed below. Do not draw anything at this time.
A. vestibule = This refers to the space between the inside of the lips and teeth.
B. tongue = The tongue is an elongated, muscular structure that lies on the floor of the mouth.
The surface of the tongue is covered by projections called sensory papillae. The papillae may vary
in shape. A large number of fibrous papillae are located along the anterior edge of the tongue
(NOTE: These are shown as the rippled edge of the tongue on your diagram.) Microscopic taste
buds are found at the sides and base of the papillae.
C. teeth = In most fetal pigs the tips of one or two exposed teeth are visible on each side of the
upper jaw. You may also see them on the lower jaw if you move the tongue.
D. palate = This structure forms the roof of the mouth. It is actually a partition that separates the
nasal cavity from the oral cavity. It is divided into two regions:
I). hard palate = This is the bony anterior portion of the palate. It is formed by
the palatine bones of the skull. It contains a series of transverse ridges, called
palatine rugae that run across the roof of the mouth (left to right).
II). soft palate = This is the muscular posterior portion of the palate. It is supported by
bone but not formed from bone. It is not rigid like the hard palate. There is a hole
in the posterior portion of the soft palate. It is the opening of the nasal passage or
naso-pharynx. It connects with the opening of the respiratory tract or oro-pharynx.
E. epiglottis = If you cut the jaw correctly, you can see the epiglottis. It is a cone-shaped flap of
cartilage. It appears to extend from the back of the tongue but it is really a separate structure
located at the top of the larynx (voice box). The epiglottis protects the slit-like opening (glottis) into
the trachea or "windpipe, which is the passageway into the lungs. During eating and swallowing,
the epiglottis covers the glottis so that food does not enter this passageway.
The following structures are already on the ORAL / BUCCAL CAVITY diagram: the upper and
lower lips (speckled), the space that forms the vestibule, the outer edge of the tip (papillae) and
sides of the tongue. Complete the diagram by adding the epiglottis and the back of the tongue.
Also add the structures to the roof of the mouth and the back of the throat. Include teeth only if
they are present and then label the structures listed next. Use brackets to indicate the hard and
soft palates.
Labels:
vestibule
teeth (if present)
hard palate
palatine rugae
soft palate
opening of naso-pharynx
epiglottis
tongue
papillae
4). Now sever the pigs lower jaw and tongue from the rest of the body but do not remove the
epiglottis with the tongue. Wrap the lower jaw / tongue in paper toweling and discard it.
5). Each person in the group should now complete a final draft of the SALIVARY GLANDS –
ORAL/BUCCAL CAVITY diagram in the following way:
SALIVARY GLANDS= Use either a black colored pencil or black ink to outline and label the three
structures. Use either a black colored pencil or black pen and a ruler to draw lines from
the labels to the structures. The lines should not cross over each other. Use black
colored pencil or black ink to draw in the masseter muscle fibers. Color both glands
yellow.
ORAL / BUCCAL CAVITY = Use either a black colored pencil or black ink to outline and label the
structures. Use either a black colored pencil or black pen and a ruler to draw lines from
the labels to the structures. The lines should not cross over each other.
6). Put the final draft copies in your pig folder. You will turn them in with the next lab (Lab #4).
PART II
Opening the Body Cavities and Locating the Organs
REFER TO DIAGRAM # 14 in the Reference Diagram Booklet
NOTE: Some specimens may contain excess preservative fluid and coagulated blood that has
escaped from blood vessels. It is a reddish-brown material / liquid located within the body
cavity. If you observe this in your pig as you begin to open the abdominal cavity, do the
following once the body cavity has been opened: take the dissection pan containing the pig
to a sink, adjust the water so that is flows gently, remove the pig from the pan and rinse it out.
Use paper towels to soak up any excess water and then continue with the dissection.
7). With your fingertips, locate the lower edges of the ribs. Your fingertips should trace an arc that
corresponds with incision #1 on diagram #14. With either the scalpel or scissors, cut incision #1 in
your pig. DO NOT CUT TOO DEEPLY!!! The internal organs are easily damaged. Directly
below the muscle, there is a thin membrane which lines the body cavity. It is called the (parietal)
peritoneum. You may have to cut through this if you did not cut it along with the muscle. The
internal organs may also be surrounded by a thin membrane called the visceral peritoneum.
Carefully make the remaining incisions (#2 through #6). Extend incision #5 to the epiglottis that
you exposed during PART I of this lab.
8). In order to completely expose the body cavity, some of the diaphragm will have to be cut away.
The diaphragm is a dome-shaped muscular wall in the region of incision #1. It separates the
thoracic (chest) cavity from the abdominal cavity. Locate the diaphragm. Two major blood
vessels and the esophagus pass through the diaphragm. Therefore, you must dissect it carefully
so that these structures are not damaged.
REFER TO DIAGRAMS # 15, the picture opposite # 15, & # 16 in the Reference Diagram
Booklet, as you locate the following structures. DO NOT CUT ANY ORGANS AT THIS TIME!!!
A. liver = The liver is dark brown and located in the upper abdomen. It is divided into five sections
or "lobes". Four of the lobes can be seen from this view. They are the left and right lateral lobes
and the left and right central lobes (refers to the pigs left and right). A very small lobe called the
caudate lobe is attached to the posterior surface of the right lateral lobe. It can be seen if the coils
of the intestine are moved aside.
B. gall bladder = Lift the pig’s right (your left) central lobe of the liver to observe the gall bladder.
It is pear-shaped and embedded in the under side of the liver. It stores bile secreted by the liver.
C. stomach / esophagus = The stomach is a pouch-like structure that lies on the pig’s left (your
right) side of the upper abdomen. It is under the liver. Anteriorly, it connects with the esophagus.
The esophagus is a muscular tube that passes through the diaphragm on the dorsal side and
extends to the oral cavity.
D. small intestine = The small intestine is composed of three parts: duodenum, jejunum and
ileum. The duodenum is the first part of the small intestine. It is a short "U-shaped" tube about 1
cm. long. The second part is called the jejunum. It makes up about half of the small intestine. The
ileum forms the rest of the small intestine. The three parts look alike from this view. The coils of
the small intestine are held together by a thin membrane called "mesentery".
E. large intestine = The end of the ileum connects with the large intestine (colon). At this junction,
there is a short blind sac (looks like a small pouch) called the cecum (caecum = Latin spelling). It
is about 2 cm. long. In some organisms, (ex. horses) this is enlarged and houses microorganisms
which digest cellulose. In humans, the vermiform appendix projects from the end of a short
cecum. The colon is a compact coiled mass of tubing on the pig’s left (your right) ventral surface.
It is shorter, darker and thicker than the small intestine. It is the major portion of the large
intestine. The posterior dorsal portion of the large intestine is the rectum. It descends along the
midline to the anus. The colon is not coiled and shorter in humans.
F. pancreas = The pancreas is a gland. The surface of this gland is like the parotid gland. It has
a “curly” appearance (similar to the top of raw broccoli in texture). Its main portion lies in the loop
of the duodenum. An elongated portion extends toward the stomach, and parts can be seen along
the dorsal body wall. It is lighter in color than the intestines. The human pancreas is more
compact.
G. spleen = This is a dark colored, elongated organ on the left side of the abdominal cavity. It lies
to the left of the stomach along its "greater curvature" (outer curve of stomach). It is attached to
the stomach by a specialized fold of peritoneum called the "gastrosplenic ligament".
The spleen looks like a dog’s (or cat’s) tongue.
H. heart and lungs = These structures are found above the diaphragm. The heart is in the center
and surrounded by an opaque, white membrane. The lungs are on each side of the heart. They
are often pinkish-tan in color and divided into sections called lobes.
I. kidneys = There are two of these structures. They are shaped like "kidney beans". They are
dorsal to the small intestines. You will have to move the intestines to see them. There is one on
each side of the vertebral column. They are outside the peritoneum against the muscles of the
back.
PART III
Removing the Internal Organs and Head from the Rest of the Body
REFER TO DIAGRAM # 16A in the Reference Diagram Booklet.
9). Cut away the ribs and muscle in the upper chest and throat regions. You should be able to see
the heart and the major blood vessels that extend out of the heart. The vessels look like thick
dental floss. Locate the trachea (looks like vacuum cleaner hose) and the larynx that is attached
to the top of the trachea. The larynx looks like a shield once you have removed all of the muscle
from its surface. The epiglottis forms the top of the larynx. Sever the common carotid and
subclavian arteries. You are now going to remove all of the internal organs in one unit. (You will
separate the unit into four parts later.) The organs are anchored to each other and to the body
wall by membranes which will have to be cut as you proceed.
10). Start by loosening the larynx, trachea and esophagus from the dorsal body wall. The
esophagus is a narrow tube that runs dorsal to, and parallel with the trachea. Continue toward the
posterior end, keeping the heart / lungs, descending aorta, alimentary canal and kidneys together
in one unit. You will have to cut more of the diaphragm to free this unit of internal organs from the
rest of the body. Sever the large intestine (colon) as close to the anus as possible. You may also
have to sever some additional smaller vessels in this area. This should allow you to remove the
organs from the rest of the body. Set the “unit” of organs aside.
11). Using bone cutters, sever the head from the body at about the fourth vertebra. There should
be two to three inches of neck attached to the head. Save the “unit of organs” and the head of the
pig. Wrap the rest of the body and the skin in paper toweling and discard it in the appropriate
(respectful) manner.
NOTE: The next two parts: Separating the Organs and Skinning the Head may be
completed in sequence, or they may be done simultaneously by two different members of
the dissection group.
Separating the Organs
12). Place the "unit" of organs in the dissection pan so that the dorsal side (backbone side) of the
lungs faces the ceiling. You will see a light colored tube. This is the large blood vessel (aorta) that
extends from the heart, down the backbone toward the hind legs. Underneath – and attached to –
the aorta there is another thin tube. This tube is the esophagus. Carefully separate the aorta and
esophagus from each other and from the rest of the organs without cutting them.
13). Trace the aorta from where it leaves the heart to the opposite end. Cut it so that about two
inches of aorta remains attached to the heart.
Trace the esophagus from where it connects to the stomach to the opposite end. Cut it so that
about two inches of esophagus remains attached to the stomach.
14). Separate the heart and lungs (includes trachea and larynx) from the rest of the organs by
cutting mesentery and any remaining diaphragm.
15). Separate the kidneys from the remaining organs by cutting mesentery and separate the liver
(includes the gall bladder) by cutting mesentery and a blood vessel. The organs that are left form
the alimentary canal (digestive tube).
The internal organs should now be divided into the following four parts:
A). heart / lungs (includes trachea & larynx)
B). kidneys
C). liver / gall bladder
D). alimentary canal
.
Skinning the Head
16). Using the diagram below as a guide, remove the skin (including the external ears) and as
much muscle as possible from the head and neck. When you are done you should be able to see
the skull and vertebrae. The vertebrae will look like a stem coming out of the back of the skull.
Completely remove the skin
and muscle from the head
and neck in this area. Leave
the skin on the snout and
around the eyes (speckled
area).
17). At this point, you will receive a new pig bag and fresh brine. Thoroughly rinse the heart /
lungs, kidneys, liver / gall bladder, alimentary canal, and head of the pig before placing them in the
new bag. Wrap the skin and muscle you removed from the head in paper toweling and discard it.
PART IV
Heart
REFER TO DIAGRAM # 15, # 17 and # 19 in the Reference Diagram Booklet.
NOTE: The ventral side of the heart is the front of the heart. Therefore, the dorsal side is the
back of the heart. The references to left and right refer to the pigs left and right. When labeling
ventral view diagrams the words left and right must be reversed from the way you observe
them.
18). The heart is located between the lungs and ventral to (in front of) the trachea. It is
surrounded by a thin, opaque membrane called the pericardial sac. The thymus gland is a mass of
tissue that sits on top of the heart. It looks similar to the other glands you have seen during the
dissections (texture of raw broccoli). Refer to diagram # 15. Even though the heart is still inside
the body, you can see the pericardial sac and thymus gland. Also look at the left picture on
diagram page # 19. This is a similar view of the heart after the organs are removed. Now carefully
cut away as much of the pericardial sac and thymus gland as possible.
19). You are now going to separate the heart and major blood vessels from the larynx / trachea
and lungs. Locate the aorta. This is the large blood vessel (light colored and tube-shaped) that
extends out of the top of the heart. Bring this over the ventral side (front) of the heart. You should
be able to see a space between the dorsal side (back) of the heart and the trachea. The trachea
looks like vacuum cleaner hose. You may need to use the probe to find this space. Small blood
vessels extend from the back of the heart into the lungs. Sever these small blood vessels and you
should be able to separate the heart from the larynx / trachea / lungs. Set the larynx / trachea /
lungs aside.
20). Refer to the left picture on diagram page # 17. Hold the heart so that you are looking at the
ventral side (front). It has two auricles (also called atria – sing. atrium) and two ventricles. The
auricles look like two pouches that sit on top of the ventricles. Externally, the ventricles appear as
one structure. You can also see the coronary artery on the surface of the heart. It runs diagonally
across the ventricles. It supplies the heart muscle itself with blood. The large pulmonary trunk,
which is the beginning of the pulmonary artery, is seen leaving the heart from the ventral surface
and extending to the pigs left (your right) side. This vessel and the aorta are arteries. Therefore,
they are round and the walls are thicker. The aorta leaves the heart from behind the pulmonary
trunk and also extends to the pigs left side. In the fetal pig, the pulmonary trunk is joined directly
to the aorta by means of a short vessel known as the ductus arteriosus. This connecting link is
present until birth. It serves as a bypass so that the blood goes back into the circulatory system. It
does not travel to the lungs for oxygen since the animal is not yet breathing air. At birth, the
ductus arteriosus shuts tightly, separating the two major blood vessels. This allows the blood to
circulate to the lungs for gas exchange.
21). Turn the heart so that you are looking at the dorsal side (back). Both of the vena cavas are
veins. Therefore, they are very thin walled tubes and do not look like blood vessels. They look
more like membranes. The caudal vena cava returns blood from the posterior portion of the body
and carries it into the right atrium. In man, it brings blood from the lower portions of the body
(legs) and is called the inferior vena cava. A similar but shorter vessel is seen anterior to the
heart. This is the cranial vena cava. It carries blood from the head and forelimbs. In man, it is
called the superior vena cava and carries blood from the head and upper portions of the body. It
also enters the right atrium. There are additional, small pulmonary arteries and veins that extend
directly into the lungs.
USE THE ROUGH DRAFT DIAGRAM ENTITLED:
HEART – VENTRAL / DORSAL / INTERNAL VIEWS.
22). Draw the ventral view of your pig’s heart in the designated area.
Label the following structures:
left and right ventricle
pulmonary trunk
left and right auricle
aorta
coronary artery
cranial vena cava
23). Draw the dorsal view of your pig’s heart in the designated area.
Label the following structures:
left and right ventricle
cranial vena cava
left and right auricle
caudal vena cava
aorta
Internal Anatomy of the heart
REFER TO DIAGRAM #18 in the Reference Diagram Booklet.
You are now going to take a slice off the front (ventral side) of the heart so that you can see into all
four chambers. Read ALL of the instructions first. If you do not understand how to complete the
cutting procedure – ask before you cut!
24). Turn the heart upside-down so that the bottom tip of the ventricle faces the ceiling and the
auricles are on the bottom of the pan. You should be looking at the ventral side. Using a sharp
scalpel, You are going to slice the front off both auricles and both ventricles so that you can look
inside all four chambers. To accomplish this, remove about 1/3 of the ventral side by cutting from
the tip of the ventricle toward the bottom of the pan. Look into the remaining 2/3 of the heart.
Normally, there is coagulated blood inside the chambers. It is reddish brown and ranges from
paste-like to solid in consistency. Remove it and rinse out the inside of the heart. Hold the heart
so that the auricles are on top. It should look like the left picture on diagram page # 18.
25). Locate the following structures: left and right auricles, left and right ventricles, pulmonary trunk
and aorta. If the aortic valves are present, you will see from one to three small flaps (depending
on your “cut”). They are inside the artery (aorta) where it connects with the ventricle. The open
ends of the valves face into the aorta. This means that any backward flow of blood from this artery
into the ventricle will fill the valves with blood so they make contact with each other to prevent the
back flow.
26). Between the right (pig’s right) auricle and ventricle, there are three flaps of tissue. This is the
tricuspid valve. Pass a probe through the valve and note that the probe emerges into the right
ventricle. The internal walls of the ventricle show muscular ridges called papillary muscles.
Extending from these muscles are fibers that look like threads. They are called chordae tendinae
and are attached to the edges of the valves. They control the opening and closing of this valve.
Repeat this procedure with the left auricle and ventricle. Locate the bicuspid or mitral valve
between the left (pig’s left) auricle and ventricle. Probe into the aorta from the outside of the heart.
Note that the probe enters the left ventricle. The aortic valve (if present) is at the junction of the
aorta and the left ventricle. The muscular wall between the two ventricles is the septum.
Draw the internal view of the heart in the designated area. Remember that the bicuspid and
tricuspid valves actually separate the auricles from the ventricles.
Label the following:
left and right auricle
left and right ventricle
bicuspid / mitral valve
tricuspid valve
pulmonary trunk
aorta
aortic valve (optional)
You have now finished the diagram named:
HEART – VENTRAL / DORSAL / INTERNAL VIEWS.
STOP AND CHANGE DIAGRAMS
To finish the lab, use the diagram named: EXCRETORY AND RESPIRATORY STRUCTURES.
Kidneys
27). Cut a kidney in half lengthwise (similar to the way you cut the heart open). The spongy outer
area is called the cortex. The white membranous central portion is the renal pelvis. Liquid waste
collects here. Draw the inside of the kidney in the designated area.
Label the following: cortex and renal pelvis
Larynx / Trachea / Lungs
REFER TO DIAGRAM # 19 in the Reference Diagram Booklet.
28). Examine the lungs. The lungs of the fetus are firmer than the spongier lung tissue found after
birth. Remove any excess tissue or muscle from the larynx. When you are finished it should look
like a shield. The epiglottis is the small flap at the top of the larynx. Lay the larynx / trachea /
lungs so that the ventral side of the trachea faces the ceiling (left picture on diagram page # 19).
The larger, right (pig’s right, your left) lung is divided into four lobes. The anterior lobe (lobe
closest to the larynx) is called the right apical lobe, the lobe posterior to it is the right cardiac lobe
and the lobe below this is the right diaphragmatic lobe. There is a fourth, smaller lobe called the
intermediate lobe. It extends from the right diaphragmatic lobe. The left lung is divided into three
lobes: the left apical, cardiac and diaphragmatic lobes. The left apical lobe is small and looks like
the top tip of the cardiac lobe.
29). Draw this view of the larynx / trachea / lungs in the designated area.
Label the following:
epiglottis
left cardiac lobe
larynx
right cardiac lobe
trachea
right diaphragmatic lobe
left apical lobe
left diaphragmatic lobe
right apical lobe
intermediate lobe
30. Cut a small section off of the lung and observe it under the hand lens. The small holes are the
bronchioles surrounded by the lung tissue. Draw this view of the lung section in the designated
area. Label the following: bronchioles and lung tissue
FETAL PIG DISSECTION LAB REPORT # 3 (70 points):
 THIS IS NOT A GROUP LAB REPORT. 
 EACH PERSON IN THE CLASS MUST TURN IN A LAB REPORT. 
This lab report consists of two final draft diagram pages. Directions for the diagrams follow:
Each person in the group must have two diagrams to turn in. Photocopies receive zero credit. The
diagrams are graded according to the following criteria:
accuracy of the drawings
neatness and correct spelling of labels
accuracy and legibility of labels
following the directions
1). Once you complete both rough draft pages, get a clean copy of each page to make your final
drafts.
2). PAGE 1 – HEART – VENTRAL / DORSAL / INTERNAL VIEWS
VENTRAL VIEW= Use either a black colored pencil or black pen to outline and label the
structures. Use either a black colored pencil or black pen and a ruler to draw lines from
the labels to the structures. The lines should not cross over each other. Color the
auricles blue, ventricles red, coronary artery yellow, the other arteries orange and the
vena cava (vein) purple.
DORSAL VIEW= Use either a black colored pencil or black pen to outline and label the
structures. Use either a black colored pencil or black pen and a ruler to draw lines from
the labels to the structures. The lines should not cross over each other. Use the same
colors you used in the ventral view.
INTERNAL VIEW = Use either a black colored pencil or black pen to outline and label the
structures. Use either a black colored pencil or black pen and a ruler to draw lines from
the labels to the structures. The lines should not cross over each other. Color the
auricles blue, ventricles red, valves yellow and arteries orange.
3). PAGE 2 – EXCRETORY AND RESPIRATORY STRUCTURES
KIDNEY – INTERNAL VIEW = Use either a black colored pencil or black pen to outline and
label the structures. Use either a black colored pencil or black pen and a ruler to draw
lines from the labels to the structures. The lines should not cross over each other.
Color the diagram (your choice).
LARYNX / TRACHEA / LUNGS – VENTRAL VIEW = Use either a black colored pencil or black
pen to outline and label the structures. Use either a black colored pencil or black pen
and a ruler to draw lines from the labels to the structures. The lines should not cross
over each other. Color the epiglottis, larynx and trachea one color. Color the lungs a
different color (your choice).
LUNG SECTION – INTERNAL VIEW = Use either a black colored pencil or black pen to
outline and label the structures. Use either a black colored pencil or black pen and a
ruler to draw lines from the labels to the structures. The lines should not cross over
each other. Color the lung tissue red and the bronchioles blue.
SALIVARY GLANDS - ORAL / BUCCAL CAVITY
SALIVARY GLANDS
ORAL / BUCCAL CAVITY
UPPER LIP
LOWER LIP
HEART - VENTRAL / DORSAL / INTERNAL VIEWS
VENTRAL VIEW
DORSAL VIEW
INTERNAL VIEW
EXCRETORY AND RESPIRATORY STRUCTURES
LARYNX / TRACHEA / LUNGS - VENTRAL VIEW
KIDNEY - INTERNAL VIEW
LUNG SECTION - INTERNAL VIEW