Across
- 3. Carry oxygenated (red) blood
- 4. Heart pumps this around the body
- 6. Carry deoxygenated (blue) blood
- 7. Very thin blood vessels (one cell thick)
- 8. Another word for 'heart beat'
Down
- 1. This organ pumps blood through the body
- 2. The heart is made from this kind of tissue
- 5. Different tissues working together
- 6. Helps the blood flow in one direction