Question

7. Vocal Cards are vibrate and produce sound during …….. ( ) a) When air passes into the lungs b) When air passes out of the lungs c) During talking d) During sleep 8. Lungs are made up of tiny sacs called….. ( ) a) Nephrons b) Alveoli c) Neurons d) Bladders 9. In all the Alveoli of lungs are spread out they will cover an area of nearly…. ( ) a. 1802 b) 160cm c) 1602 d) 180cm

Answer 1

Answer:

7. c) During talking

8. b) Alveoli

9. 160 cm

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Answer 2

Answer:

7)C

8) B

9)160cm

Explanation:

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