Human body | Organs, Systems, Structure, Diagram, & Facts
https://www.britannica.com/science/human-body
Dec 2, 2022 · human body, the physical substance of the human organism, composed of living cells and extracellular materials and organized into tissues, organs, and systems. Human anatomy and physiology are treated in many different articles. For detailed discussions of specific tissues, organs, and systems, see human blood; cardiovascular system; digestive system, …
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