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Humans and Other Multicellular Organisms


Single-celled organisms can do most things that multicellular ones can.  The difference is that in multicellular organisms, cells are organised into tissues made of similar cells,  different kinds of tissues work together to make organs that do separate jobs (like digesting food, making food, moving or reproducing) and often organs work with others to form organ systems.   The diagrams below show these organs systems in humans.

This topic is mostly about those organs and systems in humans but also about organs and systems in other living things because, especially in plants, they are also essential for our survival.


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