science

1. water concentration is lower outside the cell therefore the water moves outwards
3. muscles pull it down, it expands to let air in
4. branches" tiny veins that carry air to the aveoli
5. the lining of the mouth and the teeth
8. type that carries the blood away from the heart
9. air,moistens air & filters air
10. in circulatory system where cells and blood come in contact
12. that only refers to water
13. in the digestive system, coming from certain organs.
14. of cells, 3 types, permeable, non permeable, semi permeable

2. that push food down in the esophagus, stomach, small intestine & large intestine
6. sacs in which co2 poor and o2 rich get converted to co2 rich and o2 poor
7. between contractions
11. to expand surface area