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The throat (shared with the digestive system)


Windpipe; passage though which air moves in the respiratory system.


The passageways that branch from the trachea and direct air into the lungs.


The main organs of the respiratory system.


A large, dome-shaped muscle that plays an important role in breathing.


Tiny sacs of lung tissue where gas exchange occurs.


The voice box; located in the top part of the trachea, underneath the epiglottis.

Vocal Cords

Folds of connective tissue that stretch across the opening of the larynx and produce a person's voice.


Tiny hair-like extensions of cells that can move together like whips.


The process in which oxygen and glucose undergo a complex series of chemical reactions inside cells.

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