Concept
Version 4
Created by Boundless
Amphibian and Bird Respiratory Systems
Bird Respiration
The process of inhalation and exhalation in birds. Three distinct sets of organs perform respiration — the anterior air sacs, the lungs, and the posterior air sacs.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"BirdRespiration.svg.png."
https://en.wikipedia.org/wiki/Bird_anatomy%23/media/File:BirdRespiration.svg
Wikipedia
Public domain.