Download Chicken Wing Dissection - Mrs. Brown

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Science. 7
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Name
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Chicken Wing Dissection
Date
Ess ent ia l Q uestions
I. What are the struct ures ofthe ske letal and mu scular
sys tem?
2. What is th e func tion a/the skeletal and muscular
sys tem?
3. How do \ve move ?
Vocabulary
skele tal system, bone, ligam ent ,
bon e marr ow, j oint, carti/age,
muscular sy stem. skeletal
muscle, cardiac muscle. smooth
muscl e. tendon
O bj ect ives
1Identify the structures of the skeletal and muscular
system.
2.
Identify the functions of the skeletal and muscular
system.
i
Materials :
chicken wing
styrofoam plate
antibacterial soap
newspaper
dissecting scissors
gloves
Safety Concerns: wash your hands
P re-Lab
Read all steps of the procedure before beginning. After each step has been read a second
time and has been performed, make a check next to that step.
Procedures:
Gettin g Under the Skin
1. Examine the chicken wi ng, and compare it with the
Figure to the right.
2.
wingtip
Identify the upper wing, the lower wing, and the win gtip.
3. Examine the wing at the point where it was removed
from the body. Depending on the way the wing is cut, you
might see cartilage and bone marrow.
4.
Using the scissors, cut down the middle of the skin, st art ing at the top end of the upp er wing.
Try not to cut through the muscles below the skin. Do this by piercing the skin and then slipping
the scissors between the skin layer and the muscle. Cut u ntil you reach the shoulder joint. (See
cut 1.)
5.
Cut down the sides of the skin to make aT-shaped cut. Start at the first cut a nd cut away from it
in both directions. Peel the skin and cut to loosen it. (Note: the chicken ski n can be very difficult
to remove. Take your time peeling it back 50 as not to damage the tissues underlying it. (See cu t 2.)
Upper
Wing
Science. 7
Chicken Wing Dissection Continues
6. Peel back and remove as much skin as possible.
EPITH ELIA L SKIN
•
Remove the skin from part of the wing. Examine the web-like skin between the bones
at the joint. Look for evidence that the skin was covered with feathers. Place some of
the epithelial skin on the circle label on the newspaper.
Fat
•
Loo k for yellowish tissue clumped together beneath the skin. This is fat tissue; made of
fat cells. Place so me of the fat on the circle label on the newspaper.
7. Pull on the mu scles to make to chicken wing wave. Try to move both the lower wing and
wingtip.
Muscles
•
Observe the muscles in the wing. They look like bundles of pale pink tissue found in
the wing are skeletal muscles. Skeletal muscles are attached to bones. When the fibers
expand or contract, they produce motion.
-
Hold the wing down at the sh oulder and alternately pull on each muscle. Observe what
happens.
•
Separate some muscle from each other. Place some of the muscle on the circle label on
the newspaper.
8. Fin d connective tissue-- Observe for ligaments and tendons.
Tedo nlL iga me nts
• Te ndons are made of shiny tough white tissue that attaches the muscle to the bones.
Li game nts are what connect bone to bone. Place some of the connective tissue onto
t he newspaper.
9. Cut back all the remaining skin and muscle so that only bone remains.
10 . Snap the elbow joint and find cartilage.
Cartilage
- CARTI LAGE-- Pull back the muscle tissue from the bones. Look at the joints. Separate
t he joint and locate the ca rt ilage. This hard tissue is found at the ends of long bones. It
is usually pearly white in color. Cartilage he lps to prevent bones from grinding against
each other. Place t he bone with cart ilage onto the circle label on the newspape r.
11 . Cut the w ing tip and find bone marrow.
-
Examine the bones. Bo nes are hard tissues made mostly of calcium . There are hollow
spaces inside many bones.
e
Red blood cells are made by spongy t issue inside t hese spaces. The tissue that makes
red blood cells is called marrow. Place some of t he bone onto the circle on the
newspaper.
12. Com pl et e the Observation Table. When you have finished observing the wing a nd
writ ing your notes, raise your hand for Ms. Hundley to check you off.
Science. 7
Chicken Win g Dissection Continues
Clean-up: Wrap up the chicken remains and gloves in the newspaper
throw the r emains in the large trash ca n. Place the dissecting scissor in
t he soapy water. Wash yo ur ha n ds! If t ime go back to yo ur seat work on
questions.
13.
Obs ervat ions
One member ofthe group will complete Table 1, Data Table as y ou complete the dissection.
Make sure that this member does not touch the chicken wing. Af teryo u have cleaned up
everyone needs to complete the Data Table and Analysis Questions.
Da ta Tab le
Descript ion (color, texture, etc)
Ti ssue(s) it attaches to
Structure
Or gan or
Tissue?
Bo ne
Skin
Fa t
Mu scle
Tendon
Ligament
Cartilage
Analysi s (You do NOT need to write in complete sentences.)
1. What purpose does the connective tissue serve?
2. What type of tissue actually moves the chicken wing?
_
3. Why are tendons important to a muscle's ability to make the body move ?
4. What tissue of the chicken wing is commonly referred to as the "meat"?
5. How were you able to make the chicken wing move? (use your voca bulary from the
table.