2.7 Absorption of Materials Flashcards
1
Q
What features are in common between surfaces involved in the absorption of materials?
A
- Large surface area
- Thin walls
- Extensive blood supply
2
Q
The exchange of which materials takes place in order for what?
A
Oxygen and glucose (from food and air) must be absorbed into the bloodstream to be delivered to cells for respiration
Waste materials (carbon dioxide)
3
Q
What happens when we breathe?
A
-Oxygen passes from the lungs to the bloodstream
-Carbon dioxide passes from the blood into the lungs
4
Q
What is the structure of the lung?
A
The trachea splits into two bronchi (sgl. Bronchus), which then split further into bronchioles, which end in alveoli.
5
Q
What are alveoli?
A
The site of gas exchange in the lungs
6
Q
A
