Download WS What is an Organ (animal only) (answers).

Name:________________
SNC2P: Organs in Animals
Read pp. 54-58 to answer the following questions in complete sentences.
1.
What is an organ?
An organ is an organized group of tissues that performs a specific function
2.
What is the largest organ in your body? List 4 important functions of this organ.
Skin is the largest organ in the human body. - Barrier against disease,
insulates, releases heat, excretes wastes, make vitamin D
3a.
Where is epidermis tissue found and what is it made of?
The epidermis is the outer protective layer & made of epithelial tissue
3b.
Where is dermis tissue found and what is it made of?
Inner layer of skin made up of connective tissue, nervous tissue and muscle
tissue
4.
What is the basic function of the lungs? How much does one lung weigh?
Respiration - take oxygen (O2) in and get rid of carbon dioxide (CO2).
1 Kg - The weight of one lung
5.
List the two types of tissue that are found in the human lung.
Connective & epithelial tissue
6.
Indicate the function of the following parts of the human respiratory system:
Part
Function
trachea
Flexible tube -> carries the air toward lungs
bronchus/bronchial tubes
Smaller air passageways branching from the trachea
alveoli
Sacs at the end of bronchioles where the transfer of oxygen into the
capillaries occurs. Also, where carbon dioxide is picked up from the
capillaries
capillaries
The vessels where gas exchange occurs
7. Label the diagram below using
page 57 fig 2.5
nasal passage
mouth
trachea
bronchus
bronchioles
lung
alveoli with
capillaries
8. What is the basic function of the human heart? How big is your heart (compare it to a
another part of your body)
Supplies blood to all parts of the body. A typical person's heart is the size of their
fist.
9a) How many chambers does the heart have? Four (4)
9b. Where does the left side of the heart pump blood? (look at figure 2.6)
The left side of your heart pumps oxygenated blood to the rest of your body
9c) Where does the right side of the heart pump blood? (look at figure 2.6)
The right side of your heart pumps de-oxygenated blood to the lungs to pick up O2
and expel CO2.
10.
Use p. 57 fig 2.6 to label the diagram below. Use a ruler to neatly label the
following.
aorta, right atrium, left atrium, right ventricle,
left ventricle, path from body
Aorta
To Body
To Lung
Right Atrium
Left Atrium
Left
Ventricle
Right
Ventricle
11.
Describe the functions of the following terms as they relate to the human
digestive system
Part
Function
Esophagus
Brings food to Stomach
Peristalsis
Rythmic constriction & relaxation of the smooth muscle that lines the esophagus
stomach
Contains all four tissues, churns food & mixes chemicals to breakdown (digest)
food
small and large
intestine
More chemical digestion and water are removed
rectum
Stores solid wastes until released by through the anus
12. Label the following
parts of the digestive system
Esophagus
Stomach
Intestines
rectum
Esophagus
Stomach
Intestines
Rectum