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This tutorial investigates perception as two people can interpret the same thing differently. Know more about human perc..

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Birth of a Human Baby

Following nine months inside the mother's womb is the birth of the baby. Know the different stages of the birthing proce..

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Homeostasis is essential to maintain conditions within the tolerable limits. Otherwise, the body will fail to function p..

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Human Biology – Food and Digestion

This tutorial recognizes the importance of food as a source of energy that will fuel many biological processes. A good d..

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Organisms employ different strategies to boost its defenses against antigens. Humans have an immune system to combat pat..

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The sea was teeming with life. Eventually, through reproduction and continued variation, fish came about. There are over..