Illustration of a Human Heart - stock photo

A schematic illustration of a human heart and some details of a blood drop containing red blood cells transporting oxygen and carbon dioxide, white blood cells and platelets. Part of a series of six major human organs (lungs, heart, brain, liver, kidneys, intestines). Top: an illustration of a heart. Bottom: a series of close-ups from left to right: a platelet, a white blood cell, a red blood cell, the last two are representations of the chemical compounds oxygen and carbon dioxide.