Across
- 2. the scientific name for the heart muscle
- 5. side of the heart that is very muscular
- 6. a mammal with a really long neck
- 7. another name for the windpipe
- 8. general name for the veins and arteries
- 10. the air sacs that allow gas exchange
- 11. the part of the heart that takes in the blood
- 12. carry low pressure blood to the heart
Down
- 1. organ that pumps blood around your body
- 3. carry high pressure blood away from the heart
- 4. the things that stop blood flowing backwards
- 7. roughly how many times your heart will beat in your lifetime
- 9. sponge like organ that enables us to respire