plz plz Biology Help (Best Answer for 10 points)?

Yazan I

New member
1. Do all tubes and tubules of the bronchial tree have cartilage rings? Explain.
2. What is the function of the cilia and goblet cell.
3. Define alveoli.
4. What is the % of oxygen entering the air sacs and what is the % of oxygen leaving the air sacs.
What is the % of carbon dioxide entering the air sacs and what is the % of carbon dioxide leaving the air sacs.
5. Describe the gas exchange which occurs between the capillary network and the air sacs (alveoli)
 
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