Across
- 3. The cells that carry oxygen around the body.
- 4. Tiny vessel that connects arteries and veins.
- 6. Unneeded materials removed from the body.
- 7. The movement of blood through the body.
- 8. Useful substances in food that keep the body healthy.
- 9. The heartbeat you can feel in your wrist or neck.
- 10. The red liquid that carries oxygen and nutrients.
- 11. The tiny cell parts that help blood clot.
- 12. A flap in the heart that stops blood flowing backwards.
Down
- 1. The organ that pumps blood around the body.
- 2. The yellow liquid part of blood that carries nutrients.
- 5. A blood vessel that carries blood *away* from the heart.
- 6. The cells that fight germs and protect the body.
- 11. What the heart does to keep blood moving.
- 12. A blood vessel that carries blood *back* to the heart.