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The gastrointestinal system breaks down particles of ingested food into molecular forms by enzymes through digestion and..

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This tutorial elaborates on the physical development of humans, particularly from puberty to adulthood. Read this tutori..

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For human species to obviate extinction, reproductive mature adults should be producing viable offspring in order to con..

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Molecules move within the cell or from one cell to another through different strategies. Transport may be in the form of..

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