Across
- 3. Tiny cells that help in blood clotting
- 4. An undifferentiated cell that can divide to form specialized cells
- 7. protects your lungs from damage
- 9. long, thin cells with fine branches at the ends capable of conducting electrical impulses.
- 10. The organ system that takes in and breaks up food and then excretes the waste.
- 11. 206 of these in the human body
- 12. the biggest organ in the body, covers out muscles
Down
- 1. Organ system made up of the heart, the blood and the blood vessels. This system transports oxygen and nutrients and carries away wastes.
- 2. Thin-walled blood vessels that allow the exchange of nutrients and wastes between blood and body tissues
- 5. inside your chest protected by ribcage, produces air for the body.
- 6. clusters of air sacks in the lungs.
- 8. grows of the top of your head