The Lungs Flashcards
0
Q
Where does oxygen diffuse to?
A
Down a concentration gradient from the alveoli into the blood whilst the carbon dioxide diffuses in the opposite direction
1
Q
What raw materials are exchanged in the lungs ?
A
Oxygen and carbon dioxide
2
Q
Describe alveoli ?
A
Large surface area
Thin walls
Good supply for the efficient diffusion of gases
3
Q
How airways kept open?
A
With rings of cartilage
4
Q
How does dust and bugs leave the lungs ?
A
Dust and micro organisms are trapped by sticky mucus and cilia sweep them up and out of the lungs
