respiratory system: Media
anatomy
Videos
How much air do you breathe in a lifetime?
Every minute, multiple liters of air are cycled through your lungs.
Observe ciliated cells throughout the human respiratory system
Ciliated cells of the human respiratory tract
Images
respiratory system of a grasshopper
The respiratory system of a grasshopper, showing spiracles in the thorax and abdomen.
Encyclopædia Britannica, Inc.
diaphragm; breathing
The diaphragm contracts and relaxes, forcing air in and out of the lungs.
Encyclopædia Britannica, Inc.
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