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Earth was created around 4.5 billion years ago and life began not long after. Primitive life likely possessed the elemen..

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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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Consciousness and Behavior

Human consciousness and behavior are an interesting topic since they are determined and controlled by the brain. Conscio..

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Genetics and Evolution

Humans are diploid creatures. This means that for every chromosome in the body, there is another one to match it. Howeve..

The Human Physiology
The Human Physiology

Physiology is the study of how living organisms function. Thus, human physiology deals specifically with the physiologic..