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BioCoach Contents
Cardiovascular System I: The Beating Heart
Concept 1: Heart Anatomy
   Practice (2 pages)
   Review (4 pages)
Concept 2: The Cardiac Cycle
   Practice (1 page)
   Review (1 page)
Concept 3: Electrical Activity of the Heart
   Practice (2 pages)
   Review (2 pages)
Concept 4: Heart Pump Operation
   Practice (1 page)
   Review (1 page)
Concept 1: Heart Anatomy
The human heart is a cone-shaped muscular pump located in the mediastinal cavity of the thorax between the lungs and beneath the sternum.
The cone-shaped heart lies on its side on the diaphragm, with its base (the widest part) upward and leaning toward the right shoulder, and its apex pointing down and to the left. Roll your mouse over the graphic to see the conical shape of the heart. Have patience, this may take a few moments!
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In this biological pump, the muscles of the chamber walls provide the motive force, the valves direct the flow, and the great vessels convey blood to and from body tissues. Most of the great vessels (pulmonary trunk, aorta, and superior vena cava) emerge upward from the base of the heart.