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New Zealand is known for its unique biodiversity, caused by its remarkable geography and geologic history. Breaking away..

Direct and indirect physiologic effects of growth hormone
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Hormones are produced in the endocrine glands of animals. The pituitary gland and hypothalamus are the most impor..

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Types and Causes of Brain Damage

This tutorial describes the different types and causes of brain damage. Find out how genetics, physical injury, lack of ..

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Growth and Plant Hormones

Plants, like animals, produce hormones to regulate plant activities, including growth. They need these hormones to respo..

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Sensory Systems

A sensory system is a part of the nervous system consisting of sensory receptors that receive stimuli from the internal ..

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This tutorial introduces flowing water communities, which bring new and dithering factors into the equation for possible..