Dog Respiratory System + Birds

Larynx

Acts as a voice box. Plays a role in preventing the passage of food into the trachea.

Epiglottis

A flap of tissue that covers the larynx during swallowing, preventing food and liquids from entering the trachea.

Trachea

The windpipe that connects the larynx to the bronchi, allowing air to pass into the lungs.

Bronchus

One of the two main air passages that branch off from the trachea and lead to each lung, allowing air to enter and exit.

Alveoli

Tiny air sacs in the lungs where gas exchange occurs, facilitating oxygen absorption and carbon dioxide removal.

Syrinx

Present only in avians, this organ serves as a vocal organ in the lower trachea, just before the trachea divides into the bronchi.

Air sacs

Present only in avians, these act as storage of oxygen and push oxygen into the lungs.

Bird lungs are rigid.

Bird lungs are in fact rigid and do not expand.