Science

2. Carries oxygen poor blood to the lungs
4. Leads to the windpipe
6. Carries food from pharynx to the stomach
7. Literally means push; same as diffusion but only refers to water
9. Cell membranes are ____________________
12. When there is no net movement, and water concentration is the same inside and outside the cell.
13. carries oxygen rich blood from the heart to the (lower) rest of the body

1. Starts the breakdown of proteins in the stomach
2. Pushes food downward
3. Absorbs water; at the end of the digestive system
5. When the water concentration is higher outside of the cell, so it diffuses into the cell.
8. Has valves for one way flow; thinner, not as elastic walls
10. The mucous membrane that lines the interior of the digestive system
11. Carry blood away from the heart; Muscular, thick, elastic walls.