Respiration in Organisms - Worksheets

 CBSE Worksheet-01

Class – VII Science (Respiration in Organisms)

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1. In insects, air enters the body through
   a. Lungs b. Gills c. Skin d. Spiracles
2. During exhalation, the ribs move
   a. Upwards b. Downwards c. Outwards d. To normal position
3. Plants breathe through their stomata located in their
   a. Leaves b. Stem c. Roots d. Flowers
4. Gills are respiratory organs in
   a. Fish b. Cockroach c. Amoeba d. Earthworm
5. Match the following

   Column A	Column B
   a. Yeast	i. Man
   b. Stomata	ii. Chest cavity
   c. Larynx	iii. Voice box
   d. Diaphragm	iv. Alcohol
   e. Lungs	v. Plants

6. Fill in the blanks.
   1. The leaves of plants have small pore called ________.
   2. The larynx is also called ________,
   3. ________ respiration takes place in presence of oxygen.
   4. The oxygen carrying components in blood is ________.
   5. The small thin walled air sacs inside the lungs are called ________.
7. Define respiration?
8. What is residual volume of air? What is its importance?
9. What are stomata? Write its function?
10. Name the respiratory organs of following organisms.
    a. Amoeba b. Earthworm c. Fish d. Frog e. Insets

CBSE Worksheet-01
Class – VII Science (Respiration in Organisms)
Answer key

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1. d
2. b
3. a
4. a
5. (a) – (iv), (b) – (v), (c) – (iii), (d) – (ii), (e) – (i).
6. 1. Stomata
   2. voice box
   3. Aerobic
   4. hemoglobin
   5. alveoli.
7. The process by which living organism intake oxygen for oxidation of food to obtain energy along with carbon dioxide and water is called respiration.
8. The amount of air that always remains in lungs during inhalation and inhalation is called residual volume. It is important for exchange of gases between blood and alveoli of lung.
9. The tiny pores present on leaf surface are called stomata. Through stomata exchange of gases and transpiration takes place in plants.
10. Respiratory organs are:
    1. Cell membrane
    2. Moist skin
    3. Gills
    4. Lungs and skin
    5. Spiracles.