Respiratory system mechanics of breathing - anatomy and physiology Flashcards
1
Q
What happens with the Diaphragm ? In inspiration
A
flattens and Contracts
2
Q
What happens with the Intercostal muscles? In inspiration
A
external intercostal muscles contract
3
Q
What happens with the ribs? In inspiration
A
move up and out
4
Q
What happens with the Thoracic cavity volume? In inspiration
A
It increases
5
Q
What happens with the Thoracic cavity pressure? In inspiration
A
Decreases and air rushes into lungs
6
Q
What happens with the Diaphragm ? In expiration
A
Relaxes and moves back up
7
Q
What happens with the Intercostal muscles? In expiration
A
External intercostal muscles relax
8
Q
What happens with the ribs? In expiration
A
Move down and in
9
Q
What happens with the Thoracic cavity volume? In expiration
A
decreases
10
Q
What happens with the Thoracic cavity pressure? In expiration
A
increases
