The respiratory zone of the tracheobronchial tree includes which of the following?

A) Trachea
B) Alveoli
C) Primary bronchi
D) Larynx
E) Tertiary bronchi

Respiratory Zone

The region of the lungs where gas exchange between air and blood takes place, mainly comprising the alveoli and alveolar ducts.

Tracheobronchial Tree

The branching system of the respiratory tract that includes the trachea, bronchi, and bronchioles, acting as the passage way for air to enter into the lungs.

Tertiary Bronchi

These are smaller airways in the lungs that branch off from the secondary bronchi, leading to the bronchioles.