- Created by: lottiewhitehead123
- Created on: 14-01-18 13:58
Alveoli are tiny sacs within our lungs that allow oxygen and carbon dioxide to move between the lungs and bloodstream.
Cellulose- a carbohydrate. It forms the cell walls in plants.
Concentration gradient- the difference in the concentration of a chemical across a membrane.
Cytoplasm- the living substance inside a cell.
Diffusion- the movement…