The picture on the right is a teaching aid that demonstrates the relationship between diaphragm movement and respiratory movement. Answer the following questions according to the picture: (1) B repres

The picture on the right is a teaching aid that demonstrates the relationship between diaphragm movement and respiratory movement. Answer the following questions according to the picture: (1) B represents ______, C represents ______, and D represents ____

(1) According to the diagram, it can be seen that A represents the trachea, B represents the lungs, C represents the chest, and D represents the diaphragm.

(2) Pull down the D diaphragm with your hands, which means the diaphragm contracts and the top drops, causing the volume of the chest to increase and the air pressure in lung B to decrease, that is, the air pressure in B becomes lower, and the gas enters into B to complete the inhalation. Qi process.

(3) Letting go means that the diaphragm relaxes, its top rises, the volume of the chest cavity becomes smaller, the air pressure in the B lung increases, the gas leaves the lungs, and the exhalation process is completed.

So the answer is: (1) Lungs; chest (thoracic cage); diaphragm

(2) Increase; expand; inhale

(3) Shrink ;Exhale