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Upon fertilization, a zygote forms and develops into an embryo. This tutorial elaborates on the growth and development f..

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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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The circulatory system is key to the transport of vital biomolecules and nutrients throughout the body. Learn about the ..

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Meiosis is a form of cell division that creates gametes. It is comprised of two divisions that in the end, the resulting..

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Planktons are microscopic organisms that live suspended in aquatic habitats. There are two groups: the phytoplanktons an..