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Your heart is in the center of your chest. Your heart is not right under your skin but lies behind your breastbone, inside your rib cage, and between your lungs. The bottom of the heart is tipped to the left, so you feel more of your heart on the left side of your chest.
The heart is about the size of your fist. (When you were a baby it was the size of your baby fist). The heart is a muscle, just like the other muscles in your body. It weighs about a pound, or less than half a kilogram.
Your system of blood vessels - arteries, veins and capillaries - is over 60,000 miles (96,000 km) long. That's long enough to go around the world more than twice!
Blood is about 78 percent water. Blood takes about 20 seconds to circulate throughout the entire vascular system.
The adult heart pumps approximately 2,000 gallons (7600 liters) of blood each day throughout the body.
The heart's rate when you are a baby is about 120 beats per minute. As you grow, your heart rate slows. A seven-year-old child's heart beats about 90 times per minute. By the age of 18, the heart rate is about 70 beats per minute.
The heart beats about 100,000 times each day. In a 70-year lifetime, the average human heart beats more than 2.5 billion (250 crore) times.
During exercise, more oxygen and nutrients are needed by the muscles. Therefore, blood must be delivered faster than when the body is resting. To meet these demands, the heartbeat increases.
The heart pumps blood in a one-way path around your body through blood vessels. The heart and the vessels are called the circulatory system. The heart valves stop blood from flowing the wrong way.
The heart pumps blood in two directions. First it sends blood without any oxygen to the lungs to get oxygen. It then pumps the blood containing oxygen around all the other parts of the body. After delivering its oxygen, the blood returns to the heart to start the process of getting oxygen all over again.
Heart disease is any disorder that affects the hearts ability to function normally and there are different diseases. Dr.Gokhale explains about signs and symptoms that cause heart failure. Seek emergency treatment if you experience any of the Heart failure symptoms.