Zoology - Breathing and Exchange of Gases Question with Solution | TestHub
The diagram shows three features found in the tissues of the human respiratory system. Which tubes of the gas exchange system could be represented at position P in the diagram?
Options:
Answer:
Solution:
The mucosal surface of the trachea is lined by ciliated, pseudostratified columnar epithelium (i.e., respiratory epithelium) interspersed with goblet cells. The trachea divides into the left and right bronchi and they are histologically similar to the trachea. Bronchi are lined by ciliated, pseudostratified columnar epithelium (respiratory epithelium) and interspersed with goblet cells. Bronchi give way to smaller conducting airways, bronchioles which are thin-walled airways lined by variably ciliated or non-ciliated columnar epithelium but lack glandular cells. The tracheae, primary, secondary and tertiary bronchi and initial bronchioles are supported by incomplete cartilaginous rings.
