The heart circulation blood, The circulatory system. part ii: the heart and circulation of blood. contents: 1. location of the heart. 2. structure of the heart. 3. the valves. 4. branching blood. Heart pictures, diagram & anatomy | body maps, The heart is a vital organ located in the center of the chest with a slight tilt to the left. using rhythmic muscle contractions, it circulates blood through veins. How heart works 3d video.flv - youtube, The human body for kids/learn about the human body for children/heart song for kids - duration: 2:14. kids learning tube 1,174,978 views.

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