Question

Lungs have a large number of narrow tubes called.

• A. Alveoli
• B. Bronchioles
• C. Bronchi
• D. Alveolar ducts

Answer 1

The correct option is B Bronchioles

From the larynx, air moves into lower respiratory tract, starting with the trachea and down to the intersection that branches to form the right and left primary (main) bronchi. Each of these bronchi branch into secondary (lobar) bronchi that branch into tertiary (segmental) bronchi that branch into smaller narrow tube airways called bronchioles that eventually connect with tiny specialized structures called alveoli that function in gas exchange.

So, the correct option is 'Bronchioles'.