Alveoli are Specialised for Gas Exchange Flashcards
1
Q
What does the huge number of microscopic alveoli give the lungs?
A
An enormous surface area
2
Q
Why is there a moist lining?
A
For gases to dissolve in
3
Q
Why doesn’t the gas have far to diffuse?
A
The alveoli have very thin walls
4
Q
Why do they have a great blood supply?
A
To maintain a high concentration gradient
5
Q
Why are the walls permeable?
A
So gases can diffuse across easily
