Question

when the diaphagram _____ ( contracts / expands ) oxygen - rich air is taken into the lungs​

Answer 1

Upon inhalation, the diaphragm contracts and flattens and the chest cavity enlarges. This contraction creates a vacuum, which pulls air into the lungs. Upon exhalation, the diaphragm relaxes and returns to its domelike shape, and air is forced out of the lungs.

Answer 2

Answer:

hlw koi on li ne hai kya ...