Across
- 4. A sheet of muscle which separates the abdominal and thoracic cavities.
- 7. This is the waste product we breathe out and is left over after the oxygen is used up by the cells.
- 9. The "Flappy Thing" that opens and closes to to prevent food from entering the lungs and allows air in.
- 10. The process of energy being released when cells use nutrients and oxygen to produce energy is called _______________ Respiration.
Down
- 1. When the diaphragm relaxes and we breathe out it is called ___________.
- 2. Tube that branch off from the trachea into the lungs
- 3. This happens when we breathe in and the ribs move upwards and outwards.
- 5. These are tiny sacs in the lungs where gases are exchanged.
- 6. Tiny hairs that filter the air as it enters the body.
- 8. The body uses this for life and energy.
- 11. One is smaller than the other to make room for the heart.