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Circulation and Respiration: Heart chambers

Grade Levels: 3 - 12
Length: 00:00:45
Website: http://www.uen.org/emedia
Usage rights: Download and retain personal copies in perpetuity.

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The heart is divided into four chambers. The upper chambers are referred to as atria and the lower chambers are referred to as ventricles. The septum consists of a thick wall of tissue that separates the right and left sides of the heart.

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