Question

The ___________ is a strong wall of muscle that contracts to create a suction in the chest to draw in air and expand the lungs. When the muscle relaxes, the chest cavity decreases and the air is pushed out.
(1 point)
Responses

Pulmonary artery
Pulmonary artery

Breathing apparatus
Breathing apparatus

Trachea
Trachea

Diaphragm

1 answer

Diaphragm