Heart Health
A normal health is a strong muscular pump. It weighs between 200 and 425 (7 and 15oz) and is a little larger than the size of your fist. During an average lifetime, the human heart will beat more than 2.5 billion times. The average heart beats about 100,000 times each day and pumps about 7,200 litres (1900 gallons) of blood.
Your heart sits between your lungs in the middle of your chest, behind and slightly to the left of your breastbone. A double-layered membrane called the pericardium surrounds your heart like a sac. Blood loaded with oxygen comes from your lungs and enters your heart. To function, your heart needs a continuous supply of oxygen and nutrients, which it gets from the blood that is pumped through the coronary arteries.
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