The Human Body

1. Any of the pieces of hard, whitish tissue making up the skeleton in humans and other vertebrates
5. Spongy sacs in the chest that put oxygen into the blood and take carbon dioxide out of it
7. an organ of soft nervous tissue contained in the skull of vertebrates
8. muscle that contracts automatically
12. A tiny blood vessel they surround each of the alveoli in the lungs
13. The large, J-shaped pouch that is found between the esophagus and the small intestine
16. The lowest part or end of the small intestine
17. One of the long, thin fibers that carry signals to and from the brain
19. Tubes that carry blood away from the heart

2. A framework of bone or cartilage enclosing the brain
3. A series of vertebrae extending from the skull to the small of the back
4. A tough band that connects muscles to bones
6. Muscle that you move
7. The red liquid that the heart pumps through the body
9. The windpipe, it connects the larynx to the bronchi
10. The gas that combines with food to release energy
11. Tiny air filled pouches in the lungs
14. One of the top rooms in the heart
15. A large organ located in the upper right section of the abdomen that secretes bile
18. A nerve cell that receives and transmits nerve impulses