Question

what are the changes taking place during inspiration and expiration in the following parts. a)intercoastal muscle. b)ribs. c)diaphragm

Answer 1

all the parts do same functions both the process contraction and relaxation during inspiration and expiration .

Answer 2

Answer:

During expiration, the internal intercostal muscles contract, and the diaphragm relaxes. This is because the internal intercostal muscles contracting and the diaphragm relaxing decreases the volume of the thoracic cavity. This in turn decreases the volume of the lungs.