Across
- 2. Substance in RBC that carries oxygen, gives blood its red color
- 4. Watery part of blood
- 6. Vessel that carries blood away from the heart
- 8. Chamber of heart that pumps blood to the body
- 10. Place where RBCs, WBCs, and platelets are formed
- 11. One of the two main veins, carries blood from the legs and trunk
- 14. Layers of the heart
- 15. Working phase of the heart
- 16. Pumps blood
Down
- 1. Have no color, protect the body against infection
- 3. Chamber of heart that receives blood from the body
- 5. The thick, muscular part of the heart
- 7. Vessels that return blood to the heart
- 9. Needed for blood clotting
- 12. Tiny blood vessels
- 13. Largest artery
- 17. Red Blood cells