Across
- 4. Large vein that carries blood through heart and rest of body
- 8. Electrical signal that causes upper heart chambers to contract
- 9. Prevents backward flow of blood
- 11. Blood vessels that bring nutrients and oxygen to cells in your organs
Down
- 1. The two main chambers of the heart
- 2. Tube forming part of circulatory system
- 3. Wall of tissue Separating left and right of heart
- 5. Main artery of the body supplying oxygen
- 6. The two upper cavities of the heart
- 7. Makes up thick middle layer of heart
- 10. Tube forming part of blood circulation