Video Details

Circulation and Respiration: Respiratory system

Grade Levels: 3 - 12
Length: 00:00:34
Website: http://www.uen.org/emedia
Usage rights: Download and retain personal copies in perpetuity.

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Air flows through the trachea, which branches into the bronchial tubes, which lead to the lungs. The lungs are made of millions of balloon-like structures called alveoli, which are surrounded by capillaries.

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