Blood flow throughout the human body is greatest during systole. However, blood flow in the heart is greatest during diastole. When systole occurs the heart contracts, causing the coronory arteries to constrict and reduce blood flow through the heart while increasing it throughout the rest of the body. The opposite occurs during diastole.
The crocodile was the first animal to develop a four-chambered heart (like ours).
Your heart beats: 100,000 times a day, 35 million times a year, and 2.5 billion times a lifetime (on average)
Your heart is approximately the same size as your fist.
Squeeze a tennis ball as hard as you can with your fist. This is approximately the same amount of force your heart uses every time it pumps blood throughout your body.
In an average lifetime, the heart pumps 1 million barrels of blood.
The aorta artery is the largest artery in the body with a diameter the size of a garden hose, and yet it takes 10 capillaries to equal one human hair in thickness.
The sounds made by your heart when it beats are the sounds of the heart valves opening and closing.
Many people place their hand over the left side of their chest thinking it is the actual location of their heart. In actuality, the heart is in the center of your chest. However, it beats stronger on the left side of your chest because it is slightly tilted to the left, and it taps agianst your chest there.
When the ancient Egyptians would prepare a body for burial, the heart was the only organ that they would leave in the body. They believed it had powers necessary for entering the afterlife.
The average adult heart beats 72 times per minute at rest, but it can beat 200 times per minute during exercise.
Enough power is generated in the heart in one day to drive a car 20 miles.
Your heart pumps 9 pints of blood per minute.
The heart is the hardest working muscle in your body.
Your heart pumps 1,500 gallons of blood every day.
Lev, the Hebrew word for heart, is found 190 times in the Jewish bible under many different connotations.