Breathing Flashcards
1
Q
What happens at the alveoli?
A
Oxygen diffuses into the bloodstream
Carbon dioxide diffuses out of the bloodstream and is then exhaled.
2
Q
What does inhaled air contain?
A
Nitrogen - 79%
Oxygen - 20%
Water vapour - 0.96%
Carbon dioxide - 0.04%
3
Q
What does exhaled air contain?
A
Nitrogen - 79%
Oxygen - 16%
Water vapour - 1%
Carbon dioxide - 4%
4
Q
Where does gas exchange take place?
A
At the alveoli.
5
Q
What is surrounding the alveolus?
A
A network of capillaries
