Question

C. State TRUE or FALSE.
1. Breathing is also called internal respiration.
2. The gas produced during oxidation of food is carbon dioxide.
3. Nitrogen levels in air remain constant during exhalation and inhalation.
4. Lungs are protected within the rib cage.
5. Diaphragm is a bone that helps in breathing.
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Answer 1

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1. False, it is called external respiration.
2. True
3. True
4. True
5. False, it is a muscle.

$\bf\red{Hope \: it \: helps \: you }$

Answer 2

Answer:

1)true don't know correctly

2)true

3)true

4)true

5)false