Bronchioles/Alveoli

Question 1

What are bronchioles?

Answer 1

tertiary bronchioles divide to smaller, narrower tubes called bronchioles

bronchioles lead to alveolar sacs (sacs containing alveoli)

Question 2

What are alveoli

Answer 2

hollow, individual cavities found within alveolar sacs

extremely thin walls, allows exchange of oxygen and carbon dioxide to take place within lungs

estimated to be 3M alveoli in lung