Solve these clues to fill the grid.
- Tiniest unit of living things (plural)
- 1 Across
- The point of connection between two bones or elements of a skeleton
- 4 Across
- The length of a line segment between the center and circumference of a circle or sphere
- 7 Across
- Any skeletal muscle having two origins
- 8 Across
- Bone extending from the shoulder to the elbow
- 11 Across
- Bone linking the scapula and sternum
- 12 Across
- Any skeletal muscle having three origins
- 15 Across
- The longest and thickest bone of the human skeleton
- 16 Across
- Either of two saclike respiratory organs in the chest of vertebrates (plural)
- 2 Down
- A blood vessel that carries blood from the capillaries toward the heart
- 3 Down
- A small flat triangular bone in front of the knee that protects the knee joint
- 5 Down
- Part of an organism consisting of an aggregate of cells having a similar structure and function
- 6 Down
- The hard structure that provides a frame for the body of an animal
- 9 Down
- Animal tissue consisting predominantly of contractile cells (plural)
- 10 Down
- A blood vessel that carries blood from the heart to the body
- 13 Down
- Any bundle of ___ fibers running to various organs and tissues of the body (plural)
- 14 Down