Muscular and Skeletal System

4. a thick muscle on the dorsal part of the upper arm
10. skeletal muscles at the back of your thigh
12. responsible for the trunk, spine, and core
14. bones that reach from the base of the skull to the tailbone
15. a large superficial back muscle that resembles a trapezoid
16. the main bone of your lower leg, forming what is more commonly known as the shin
17. a slightly curved bone that connects your arm to your body
18. a muscle that looks like an upside-down triangle
20. composed of 22 bones divided into two regions

1. the shaft is slightly curved into convex for the body
2. a set of twelve paired bones which form the protective cage of the thorax
3. a muscle that lies underneath the breast tissue
5. a partially T-shaped vertical bone that forms the anterior portion of the chest wall centrally
6. bumps or bulges that are commonly called the "six pack"
7. the smaller of the two bones in your lower leg
8. a thick tendon located in the back of the leg
9. the longest, heaviest, and strongest human bone
11. a thick muscle on the ventral portion of the upper arm
13. a complex muscle that that is fundamentally involved in walking and posture
19. the largest and uppermost bone of the hip