Across
- 3. area of necrosis caused by interrupted blood supply
- 6. membrane surrounding the heart
- 10. food tube
- 11. windpipe
- 12. this portion of the giraffe heart is larger to pump blood up to the brain
- 13. space in the thoracic cavity between the lungs
Down
- 1. another name for the cardiovascular system
- 2. these vessels carry blood to and from the heart
- 4. middle layer of heart wall
- 5. length of pregnancy
- 7. deficiency of blood to an area
- 8. how many chambers in a mammal heart
- 9. the heart pumps about 2,000____ per day