Question

20. Identify the correct statement from the following.
1) When the diaphragam flattens the volume of chest cavity increases
2) There is no role of nervous regulation in guiding the function of epiglottis and passage of food
and air
3) Only CO, is transported by the blood.
4) Most of the CO, is transported through haemoglobin and very few through plasma.​

Answer 1

1) when the diaphraGam flattens the volume of chest cavity decreases.

2)three is a role of epiglottis in passage of food and air

3)both co2 and o2 are transported in the blood

Explanation:

so option. 4 is correct