Your heart is a muscular organ that pumps oxygen-rich blood throughout your body. It is the center of your circulatory system, which is composed of a network of blood vessels such as capillaries, veins and arteries. These blood vessels carry blood to each part of your body, thus your heart is important to your health and everything that goes on in your body. Here are 20 truly amazing facts about this incredibly powerful organ that are worth learning.


Unlike most tissues in your body, the cornea lacks blood vessels. It receives its nourishment from the tears and the fluid that fills the chamber behind it. The cornea must stay transparent to refract light adequately and the presence of even the smallest blood vessels can interfere with the process.

Blue Whale

The blue whale has the biggest heart of any animal. It’s heart can weigh over 1,500 pounds and be the size of a small car.

Physical Work

During a lifetime, your heart does the most physical work of any muscle. Your heart’s power output ranges from 1-5 watts.


According to a study published in the journal Circulation, cardiac mortality is greater around New Year’s and Christmas than at any other time.

Topics: science , heart
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