How exactly is pressure changing when breathing takes place. Here's what I understand:
- Diaphragm contracts, volume increases, so pressure decreases (via PV=nRT)
- Air comes in because the high pressure outside has a tendency to equilibrate with the lower pressure of the peritoneal lumen
But then I get a little bit confused
- Why does air stop coming into the lungs? If the pressure just keeps going down, wouldn't air basically fill up to the entrance of the mouth/nose?
- What causes the air to go out? Is it that the relaxation of the diaphragm forces it out, or is it due to pressure differences once again?
- Diaphragm contracts, volume increases, so pressure decreases (via PV=nRT)
- Air comes in because the high pressure outside has a tendency to equilibrate with the lower pressure of the peritoneal lumen
But then I get a little bit confused
- Why does air stop coming into the lungs? If the pressure just keeps going down, wouldn't air basically fill up to the entrance of the mouth/nose?
- What causes the air to go out? Is it that the relaxation of the diaphragm forces it out, or is it due to pressure differences once again?
