respiratory system
Across
- 4. what tissue seals off the trachea and prevent food from entering and can also breath out
- 5. where in the lungs located
- 6. what air way leads from larynx the bronchi
- 7. what is something human can not live without
Down
- 1. which two structure does the trachea lead to in the lungs
- 2. what are the tiny air sacs in the lungs called
- 3. what is the main part human breath from other than there mouth
- 5. dioxide we breath in oxygen and release