10 facts about Heart from Haniya Khan's blog

1. Size and Weight: The human heart is roughly the size of a fist and weighs about 250 to 300 grams (9 to 11 ounces) in adults.

2. Beating Rate: On average, the human heart beats about 70 times per minute at rest. This means it beats approximately 100,000 times a day and 2.5 billion times during a lifetime.

3. Blood Pumping: The heart pumps about 70 milliliters of blood per beat. This amounts to about 5 liters (1.3 gallons) of blood per minute or 7,200 liters (1,900 gallons) per day.

4. Blood Vessels: There are about 60,000 miles (97,000 kilometers) of blood vessels in the adult human body. If you stretched out all the blood vessels, they could encircle the Earth about 2.5 times.

5. Electrical System: The heart's pumping is regulated by an electrical conduction system that coordinates the contractions of the heart chambers. This system ensures that the heart beats in a synchronized way.

6. Beating Sound: The sound of your heartbeat is caused by the valves in your heart opening and closing and the blood flowing through your heart.

7. Heartbeat Sound Variations: A doctor can listen to your heartbeats and detect various issues. For example, a "murmur" is an abnormal sound that can indicate a problem with one of the heart's valves.

8. Heartbeats in Fetus: A baby’s heart begins to beat around 22 days after conception. By the end of the third month of pregnancy, the fetus' heart is fully formed and functional.

9. Heart Attack Risk: Heart disease is the leading cause of death worldwide. Certain risk factors, such as high blood pressure, high cholesterol, smoking, and obesity, can increase the risk of heart attacks.

10. Heart Transplants: The first successful human heart transplant was performed by Dr. Christiaan Barnard in 1967. Since then, heart transplant surgery has become a viable treatment option for certain heart conditions.

Remember, these facts are generalizations, and individual human hearts can vary in many ways.