BIO

Edit Answers
1234567891011121314
Across
  1. 2. A muscle that helps you breathe by moving up and down.
  2. 4. A small flap that stops food from going into the windpipe.
  3. 7. A gas in the air that we need to breathe and stay alive.
  4. 10. Cells that control the opening and closing of tiny holes in plant leaves.
  5. 11. Plant tubes that carry water from the roots to the leaves.
  6. 13. Animals with jointed legs and hard outer bodies, like insects and crabs.
  7. 14. Very thin blood vessels that allow oxygen and nutrients to pass to body cells.
Down
  1. 1. Tiny air sacs in the lungs where oxygen enters the blood
  2. 2. The movement of substances from a crowded area to a less crowded area.
  3. 3. The process of taking in oxygen and releasing carbon dioxide.
  4. 5. Tiny blood cells that help stop bleeding by forming clots.
  5. 6. Small openings in plant leaves that let air in and out.
  6. 8. Plant tubes that carry food (sugar) from the leaves to the rest of the plant.
  7. 9. The tube that carries air from the nose and mouth to the lungs.
  8. 12. A substance in red blood cells that carries oxygen.