Across
- 5. sheet of muscle beneath the lungs and above the abdomen that contracts and relaxes to help the chest expand so a person can inhale or shrink so a person can exhale
- 6. body system that helps the body move and aids other body systems
- 7. hollow, muscular organ located in the center of the chest; pumps blood into the circulatory system
- 10. body system made up of 206 bones that provides structure, shape, and protection to the body
- 11. blood vessels that carry oxygen-rich blood
- 12. location in the body where two or more bones meet and are held together
- 15. strong bands of tissue that hold together bones at joints to allow movement
- 17. structures made of tough tissue that connect muscle to bone
- 18. small arteries that deliver oxygen and nutrients to cells and pick up cells’ waste
- 19. exchange of oxygen and carbon dioxide between the body and the air around it
- 20. body system formed by all the structures that move blood through the body; also called the cardiovascular system
Down
- 1. middle layer of the skin, which contains hair follicles
- 2. liquid part of blood
- 3. collection of organs that work together
- 4. body system that covers and protects the entire body
- 8. innermost layer of the skin, which contains fat, blood vessels, and nerve endings; attaches to underlying bone and muscle
- 9. body system of organs that obtain vitally important oxygen from the outside world
- 13. blood vessels that carry oxygen-poor blood
- 14. outermost layer of the skin
- 16. two air passages, each of which connects the trachea to a lung