Respiration Flashcards
1
Q
Breathing in
A
- diaphragm and intercostal muscles contract
- thorax volume increases
- pressure decreases
2
Q
Breathing out
A
- intercostal muscles and diaphragm relax
- thorax volume decreases
- air is forced out
3
Q
Alveoli adaptations
A
- huge surface area
- moist lining for gases to dissolve into
- thin walls (one cell thick)
- great blood supply to maintain a high concentration gradient
- permeable walls
