Question

Relaxation of rib muscles and diaphragm leads to​

Answer 1

Answer:

exhalation

Explanation:

diaphragm relax during exhalation and become dome like shape intercostal muscle during exhalation also relax

Answer 2

Explanation:

During inspiration, intercoastal muscles contracts, rib cage comes up and diaphragm gets inflated which creates a cavity in the lung and the pressure decreases so as a result air from outside moves in....

During expiration, the intercoastal muscles relaxes , rib cage goes down and diaphragm gets flattened again which increases the pressure on the lungs and as a result air moves out of the lungs..

Basically this are the mechanism of breathing....for more better answers consult class 11 ncert in biology for diagrams and other details.

Thank you...