Solve these clues to fill the grid.
- A mechanical device that moves fluid or gas by pressure or suction
- 1 Across
- The rate at which the heart beats
- 3 Across
- A blood vessel that carries blood from the heart to the body
- 5 Across
- Physical activity that keeps you fit
- 8 Across
- Gas in the air that we need to breathe
- 9 Across
- Either of two saclike respiratory organs in the chest of vertebrates (plural)
- 10 Across
- In good shape and not sick
- 11 Across
- Movement through a ___
- 13 Across
- Organ that pumps blood around the body
- 15 Across
- Rigid connective tissue that makes up the skeleton of vertebrates (plural)
- 16 Across
- A unit of time equal to 60 seconds or 1/60th of an hour
- 2 Down
- The hard structure that provides a frame for the body of an animal
- 4 Down
- Red liquid pumped around the body by the heart
- 6 Down
- Edible seeds or roots or stems or leaves or bulbs or tubers or nonsweet fruits of any of numerous
- 7 Down
- Sweet food that grows on plants
- 12 Down
- A blood vessel that carries blood from the capillaries toward the heart
- 14 Down