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10.4: Human Organs and Organ Systems

10.4: Human Organs and Organ Systems

An organ is a collection of tissues joined in a structural unit to serve a common function. Organs exist in most multicellular organisms, including not only humans and other animals but also plants. …

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This incredible animation shows how humans evolved from early life

This incredible animation shows how humans evolved from early life

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Human Evolution Lesson for Kids: Timeline & Stages

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The evolution of humans

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