Human Heart: Diagram and Anatomy of the Heart Internal Anatomy of the Heart The human heart is a muscular organ that pumps blood throughout the body. It is located in the center of the chest and is about the size of a fist. The heart is divided into four chambers: two atria and two ventricles.

Human heart diagram / illustration screen print

Heartbeat animation in Material Design style.

A look at how the human heart evolved from two and three heart chambers into the four-chambered structure it is today.

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