Question

Solve the crossword puzzle given along below with the help of the clues provided:

Across

2. Process in which food is broken down, and energy is released (11)

6. Taking in of air rich in oxygen (10)

8. The main organ of respiration in humans (4)

9. The term used to describe one inhalation and one exhalation (6)

11. Opening through which exchange of gases takes place in old stem (8)

Down

1. Respiration in the presence of oxygen (7, 11)

3. Opening present on the body surface of a cockroach for gas exchange (8)

4. Giving out of air rich in carbon dioxide (10)

5. The physical process of exchange of gases in organisms (9)

7. Organism respiring in the absence of oxygen (8)

10. The respiratory organ in fish (4)

Accepted Answer

Across

2. Respiration: It is the process of breakdown of food in the cells to produce energy.

6. Inhalation: It is the process of taking in air rich in oxygen into the body.

8. Lung: It is the main organ of respiration in the human body. It is protected by the rib cage.

9. Breath: One inhalation and exhalation constitutes a breath.

11. Lenticel: Plants have various organs through which exchange of gases takes place. In old stem, lenticels perform gaseous exchange while in leaves, stomata are responsible for this function.

Down
1. Aerobic respiration: It is the type of respiration which takes place in the presence of oxygen. The end products obtained are carbon dioxide, water, and energy.
3. Spiracles: These are openings present on the body surface of cockroach. They are connected to air tubes called tracheae where gaseous exchange takes place.

4. Exhalation: It is the process of giving out of air rich in carbon dioxide.
5. Breathing. It is the physical process of exchange of gases in an organism in which oxygen is taken in, and carbon dioxide is given out.
7. Anaerobes: Organisms that can respire in the absence of oxygen are called anaerobes. Example: Yeast.
10. Gills: Fish and other aquatic organisms have special respiratory organs called gills for taking in dissolved oxygen of water.

Important Questions on Respiration in Organisms

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