Breathing Mechanics a. Comparing the breathing mechanics model with the body, indicate the body parts simulated by the: bell jar rubber sheet glass tubing balloons b. When the rubber sheet of the breathing mechanics model is pulled down: the volume of the bell jar is and the air pressure in the bell jar is , which causes air to flow into the lungs. c. When the rubber sheet of the breathing mechanics model is pushed up: the volume of the bell jar is pressure in the bell jar is out of the lungs. and the air which causes air to flow d. During inspiration, atmospheric air pressure is air pressure in the lungs. During expiration, atmospheric air pressure is dif pressure in the lungs