2.7 Absorption Of Materials Flashcards
1
Q
What materials must be transported from the bloodstream into cells for respiration?
A
Oxygen and nutrients
2
Q
What waste materials need to be removed from cells and put back into the bloodstream?
A
Carbon dioxide and water
3
Q
How are surfaces involved with the absorption of materials better adapted?
A
Surfaces involved with the absorption of materials have certain features in common:
- Large surface area,
- thin walls,
- extensive blood supply.
4
Q
What organ is used for gas exchange?
A
The lungs
5
Q
Where in the lungs does gas exchange occur?
A
At the alveoli
6
Q
What is absorbed in the lungs and how?
A
Oxygen and carbon dioxide, through the thin alveolar walls or from the many blood capillaries
