Respiratory zone

Definition

The respiratory zone is the part of the respiratory system where gas exchange between air and blood occurs, primarily within the alveoli. It consists of structures including the respiratory bronchioles, alveolar ducts, and alveolar sacs.

Related terms

Alveoli:

Tiny air sacs in the lungs where oxygen and carbon dioxide are exchanged with the bloodstream.

Bronchioles:

Small passages in the lungs that lead air to and from the alveolar spaces for gas exchange.

Gas Exchange:

The process by which oxygen is absorbed into the body from the lungs and carbon dioxide is expelled out of the body to the lungs