2.  The average size of a Females heart is 9 pounds. The average size of a Males heart is 10.5 pounds.  The heart is about the size of your fist.  The heart pumps approximately 2,000 gallons of blood through the body.  Your heart beats / contracts about 200,000 times a day.  When your heart beats / contracts it is called systole.  There is three layers of tissue that form around the heart.

9. The right side comprises the right atrium and right ventricle; these chambers collect oxygen- poor blood and pump it to the lungs, where oxygen is replenished. The left side of the heart comprises the left atrium and left ventricle; these chambers collect and pump the oxygen-rich blood to the body.

17. The hear is located in the Mediastinum. The Mediastinum is the central sub- division of the thoractic cavity. It is located above the diaphragm, between the lungs, and behind the sternum.