Across
- 5. any of the tubes through which blood flows through the body
- 6. a very small cell in the blood that makes it thicker and more solid in order to stop bleeding caused by an injury
- 10. a complicated system of tubes that cross each other and are connected to each other
- 12. like somebody/something but not exactly the same
- 13. needing careful treatment, especially because easily damaged
- 16. to send an electrical signal
- 17. an almost solid piece of something
- 18. to be filled with power
- 19. the area at the top of the throat that contains the vocal cords
- 20. any of the tubes that carry blood from all parts of the body towards the heart
- 21. the pale yellow liquid that forms 55% of human blood and contains the blood cells
- 23. to send air out of your lungs, breathe out
Down
- 1. a structure in the heart or in a vein that lets blood flow in one direction only
- 2. substances that flow and are not solid
- 3. to be made or formed from several parts
- 4. either of the two lower spaces in the heart that pump blood to the lungs
- 7. to produce a strong, regular beat
- 8. the regular beating of the heart, especially when it is felt at the wrist or side of the neck
- 9. either of the two upper spaces in the heart
- 11. the tubes that carry blood from the heart to other parts of the body
- 14. connected with the heart
- 15. the act of giving something and then something else is given back
- 17. one of four spaces in the heart
- 22. materials that are no longer needed