Across
- 6. The heart has sections called _________
- 8. Our bodies need ___________ to run smoothly and help us grow,
- 11. The vessels that carry blood back to the heart
- 13. The amount of blood in the capillaries helps adjust ________
- 15. The heart is a powerful ___________
- 17. To burn nutrients into food
- 18. A waste product in the blood
- 19. The __________ of the capillaries are very thin
Down
- 1. Arteries and veins are connected by these tiny blood vessels
- 2. The heart, arteries, veins, and capillaries working together
- 3. Extra blood flows to the surface of the skin when the body is too _________
- 4. The heart pushes blood through the body with a system of ____________
- 5. The heart ____________ carbon dioxide waste for fresh oxygen
- 7. Heart valves open and shut ______________
- 9. The vessels that take blood to the bod
- 10. We get this from breathing in air
- 12. Nutrients and oxygen are carried to every _________ by the blood
- 14. When the body is too ____________, blood flow is restricted
- 16. Where our energy comes from (after it enters our digestive system