• Your heart pumps about 5 liters of blood per minute but it’s only about the size of your fist.

• It’s estimated that in a 70-year period, your heart will beat over 2.5 billion times.

• In most adult humans, a normal resting heart rate is between 60 to 100 beats per minute.

• The total length of all of the blood vessels in your body is about 60,000 miles.

• Capillaries are your most numerous blood vessels and also the smallest. Red blood cells often have to move through the capillaries in single-file.

• Your blood pressure changes throughout the day. It’s lowest when you’re asleep, and it peaks in the middle of the afternoon.