Across
- 3. cavity which holds lungs, heart, esophagus, trachea, and major blood vessels
- 5. type of system that turns food into energy
- 9. type of cell that transmits nerve impulses
- 10. type of valve that regulates flow of blood from left ventricle to the aorta
- 11. cells that pigment the skin
- 12. another name for the skull, a bone which protects the brain
- 14. medical condition where bones become brittle and fragile
- 15. essential protein found in red blood
- 16. bone located in upper arm between shoulder and elbow joints
Down
- 1. type of system that protect internal organs
- 2. slowed heart rate
- 4. infection that creates fluid buildup in the lungs
- 6. fibrous tissue that produces movement
- 7. organ that aids in digestion and produces insulin
- 8. bluish / grayish coloring of the skin
- 13. an organ that secretes chemical substances
- 17. the most superficial layer of the skin