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Universal Knowledge Library: Human Body
Humans have a bilaterally symmetrical body characterized aracterized by a backbone, hair, mammary glands and highly developed sense organs. Human body is composed of liv cells and extracellular materials organized into tissues, organs and systems.
Powered by the heart, it is the body's distribution system supplying oxygen, hormone and essential nutrients to the organs that keeps it alive. Billions of microscopic parts wo together to make the human body function as a whole. Read more.
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