The human heart weighs less than 1 pound.Christmas day is the most common day of the year for heart attacks to happen.This is because the left side has to get blood up the giraffe’s long neck to reach their brain.

The giraffe has a lopsided heart, with their left ventricle being thicker than the right.Whales have the largest heart of any mammal.The American pygmy shrew is the smallest mammal, but it has the fastest heartbeat at 1,200 beats per minute.The fairy fly, which is a kind of wasp, has the smallest heart of any living creature.The earliest known case of heart disease was identified in the remains of a 3,500-year-old Egyptian mummy.Her surgery was successful, but she’ll eventually need a heart transplant. She had a heart defect that many babies don’t survive. The youngest person to receive heart surgery was only a minute old.Larsson died at 86 of a disease that was unrelated to his heart. Arne Larsson, who received the pacemaker, lived longer than the surgeon who implanted it. The first implantable pacemaker was used in 1958.It was performed by Daniel Hale Williams, who was one of the few black cardiologists in the United States at the time. The first open-heart surgery occurred in 1893.The heart can continue beating even when it’s disconnected from the body.It’s called the cardiac conduction system. An electrical system controls the rhythm of your heart.

Your heart pumps about 2,000 gallons of blood every day.

Your heart will beat about 115,000 times each day.

The average heart is the size of a fist in an adult.

While you’re probably familiar with a few heart-healthy tips, there are some fun facts about the heart that you may not know.

Cool heart icon