Question

when diaphragm flattens what happens
a.volume of chest cavity increases
b.volume of chest cavity decreases
c.pressure in chest cavity increases
d.pressure in chest cavity decreases.

1.a&b only
2.b&c only
3.a&d only
4.b&d only
which is correct option​

Answer 1

Answer:

3)a&d only

Explanation:

Upon inhalation, the diaphragm contracts and flattens and the chest cavity enlarges