Solve these clues to fill the grid.
- Either of two saclike respiratory organs in the chest of vertebrates (plural)
- 4 Across
- Organ that pumps blood around the body
- 6 Across
- The region of the body of a vertebrate between the thorax and the pelvis
- 8 Across
- The bodily process of inhalation and exhalation
- 9 Across
- Gas in the air that we need to breathe
- 10 Across
- One of the contractile organs of the body
- 1 Down
- A custard-like food made from curdled milk
- 2 Down
- Clear liquid we drink that falls as rain
- 3 Down
- In good shape and not sick
- 5 Down
- The power to do work or make things move
- 7 Down