Body System Puzzle

2. contains approximately one hundred billion neurons
5. narrower than the right to make room for the heart
6. the thickest of the heart's chambers and is responsible for pumping oxygenated blood to tissues all over the body
8. Connect the peripheral nervous system to the brain
10. carries deoxygenated blood from the lower half of the body to the right atrium of the heart
12. protects our brains
13. responsible for elevating the arm in the scapular plane and its contraction in doing this also elevates the humeral head
18. Without it, you could not keep yourself upright or even stand up
19. made up of two parts. It has two heads, a long head and a short head
20. the largest, most powerful muscle to work against gravity

1. A bundle of connected nerves in the neck region of your spinal cord sends branches down into your shoulders, arms, and hands
3. receives and holds deoxygenated blood from the superior vena cava
4. airways that lead from the trachea into Bronchi the lungs and then branch off into progressively smaller structures until they reach the alveol
7. It is the strongest bone in the human body and can resist a force of up to 1,800 to 2,500 pounds
9. transmits information through electrical and chemical signals
11. main route for breathing
14. makes up 2/3 of the muscle in your arm
15. shorter than the left to make room for the liver
16. one of the four chambers of the heart, receives blood full of oxygen from the lungs and then empties the blood into the left ventricle
17. basin-shaped structure that supports the spinal column and protects the abdominal organs