Vocabulary

3. A muscle that increases the angle between two bones, like your tricep when you straighten your arm.
4. The soft, fatty tissue inside certain bones where new blood cells are produced.
7. The main organ of the nervous system that controls all body functions.
12. The rigid tissue that makes up the skeleton of the human body.
13. Nervous System (PNS) Includes the nerves that branch out from the CNS to all parts of the body.
15. Nervous System (CNS) Composed of the brain and spinal cord, it processes and transfers information.
16. Part of a neuron that gathers information and carries it toward the cell body.
17. The tiny gap between two neurons where a message is passed.
19. cord The bundle of nerves that extends from the brain down the back and is protected by the vertebrae.
22. muscle A muscle that you can control and move by choice, like the muscles in your arms and legs.
27. A flexible, elastic tissue that covers the ends of bones and acts as a shock absorber.
29. A bundle of neurons that transmits impulses.
30. muscle Voluntary muscles attached to bones that allow for conscious movement, such as walking or running.
31. A tough cord of tissue that attaches muscle to bone.

1. A muscle that decreases the angle between two bones, like your bicep when you bend your arm.
2. The small bones that make up the spinal column and protect the spinal cord.
5. Part of a neuron that sends information away from the cell body to other neurons.
6. muscle A muscle that moves automatically without you thinking about it, such as your heart.
8. The bones of the chest that protect the heart and lungs.
9. An electrical signal that travels along a neuron to transmit information.
10. A place where two or more bones meet, which allows for movement.
11. muscle The specialized involuntary muscle found only in the heart that pumps blood.
14. A tough band of tissue that connects bones to other bones at a joint.
18. muscle Involuntary muscles that control movement in the internal organs, like the stomach and blood vessels.
20. The bony framework of the head that protects the brain.
21. A muscle that pulls in the opposite direction of another muscle to create balance.
23. An automatic and quick reaction to a stimulus that is not controlled by choice.
24. A tissue composed of fibers that contract and relax to create movement.
25. To shorten or tighten a muscle, causing movement.
26. The internal framework of bones and cartilage that supports the body.
28. A specialized nerve cell that carries electrical messages, or impulses, throughout the body.