The Respiratory System
Across
- 3. / This muscle sits under our lungs and contracts and releases to help our lungs breathe.
- 5. / The large tube that connects our mouth and nasal cavity to our lungs is called our _______.
- 7. / Breathing is controlled by our _______ Nervous System, which means we don't have to think about it!
- 8. / The small sacs of air in our lungs are called _______.
- 10. / This is the word for taking air into the lungs.
- 11. / The tiny branch-like tubes in our lungs are called _______.
- 12. / These thin blood vessels carry blood cells to our lungs.
- 13. / This is the word for pushing air out of the lungs.
Down
- 1. / When we breathe in, our muscles contract and our ribs move outward, which creates more volume in our chest and decreases the _______ inside. This difference between the inside of our chest and the environment around us causes air to be pulled into the lungs.
- 2. / This process makes the higher concentration of oxygen in our lungs move into the oxygen-deprived blood cells, and vice versa for the carbon dioxide moving from the cells to the lungs to be exhaled.
- 4. / Oxygen from our breath attaches to this protein in our red blood cells and is carried away to the rest of the body.
- 6. / When we exhale, we release _______ _______.
- 9. / These are the organs we breathe with!
- 14. / When we breathe, we take in _______.