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2. Which organs are associated with the process of respiration?

3. State the function of fine hair present in the nasal cavity.
4. Define respiration.

5. Why are the sizes of two lungs different?

B. Answer the following questions briefly :
Define the following in one line :

1. Spongy 2. Deoxygenated

3. Bacteria 4. Haemoglobin
5. Alveoli 6. Spirometer

One Among All Multiple Choice Questions (MCQs)
One Among All Multiple Choice Questions (MCQs)

Tick (ü) the correct option :
1. The total surface area of the lungs is ____________ .

(a) 70 square metres (b) 50 square metres

(c) 80 square metres (d) 60 square metres

2. A physical movement associated with gaseous exchange is called ___________ .
(a) respiration (b) spirometer

(c) circulatory (d) coronary

3. The respiratory system consists of ____________ .
(a) nasal cavity (b) the mouth

(c) internal respiration (d) circulatory system

4. The act of breathing in is called ____________ .
(a) respiration (b) inhaling

(c) exhaling (d) circulatory

5. The system used to measure the volume of air inspired and expired, is known as

____________ .
(a) spirometer (b) meter

(c) regulatory (d) circulatory

High Order Thinking Skill (HOTS)

1. The high levels of activity lead to a greater demand for oxygen and increased rate of
breathing, justify.

2. How the oxygen cylinder was more useful during COVID-19.

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