Across
- 2. prevent backward flow of blood in the heart
- 7. thin walled upper heart chambers which receive blood and pump blood to the ventricles
- 8. Most Numerous
- 10. muscular thick-walled lower chambers which pump blood from the heart
Down
- 1. Acts as a pump to move blood around your body
- 3. Carry blood toward the heart
- 4. Connect arteries to veins
- 5. Carry blood away from the heart
- 6. delivers nutrients and oxygen to all cells in the body
- 9. muscular central wall dividing heart into two halves, prevents oxygen-rich and oxygen-poor blood from mixing