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2. Heart - Wikipedia

   en.wikipedia.org/wiki/Heart

   The heart is a muscular organ found in humans and other animals. This organ pumps blood through the blood vessels. [1] Heart and blood vessels together make the circulatory system. [2] The pumped blood carries oxygen and nutrients to the tissue, while carrying metabolic waste such as carbon dioxide to the lungs. [3]

3. 10 Surprising Facts You Didn’t Know About Your Heart - AOL

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4. Human body - Wikipedia

   en.wikipedia.org/wiki/Human_body

   Human anatomy is the study of the shape and form of the human body. The human body has four limbs (two arms and two legs), a head and a neck, which connect to the torso. The body's shape is determined by a strong skeleton made of bone and cartilage, surrounded by fat (adipose tissue), muscle, connective tissue, organs, and other structures.

5. Heart development - Wikipedia

   en.wikipedia.org/wiki/Heart_development

   The heart is the first functional organ in vertebrate embryos. The tubular heart quickly differentiates into the truncus arteriosus, bulbus cordis, primitive ventricle, primitive atrium, and the sinus venosus. The truncus arteriosus splits into the ascending aorta and the pulmonary trunk. The bulbus cordis forms part of the ventricles.

6. Here's an incredible first look at the largest heart that ...

   www.aol.com/article/2015/08/24/heres-an...

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7. 9 Bonkers Facts About the Human Body That’ll Make You ... - AOL

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   Ignorance Really Is Bliss. The human body is a beast of a machine. The heart is a timeless masterpiece. The brain literally named itself. All of that being said, tread lightly through this list of ...

8. Circulatory system - Wikipedia

   en.wikipedia.org/wiki/Circulatory_system

   In vertebrates, the circulatory system is a system of organs that includes the heart, blood vessels, and blood which is circulated throughout the body. [1] [2] It includes the cardiovascular system, or vascular system, that consists of the heart and blood vessels (from Greek kardia meaning heart, and Latin vascula meaning vessels).

9. Test your knowledge with these 100 fascinating facts - AOL

   www.aol.com/news/test-knowledge-72-fascinating...

   These interesting facts will help you learn more about our planet, ... Human teeth are the only part of the body that cannot heal themselves. ... Your heart beats an average of 100,000 times each day.