Monthly Archive: January 2015

Collective Behavior Social Movements

Social movements begin when large people are of like minds on an issue, find conditions intolerable and are prevented from getting satisfaction by the authorities or the government. They can include forming worker’s unions, regular assemblies and protests, regular spates of rioting and violent…
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Anatomy Physiology

Circulatory systems are necessary for living organisms to transport nutrients, waste and gases from all the cells in the body. Even single cell organisms perform this function and use their surface as an exchange point. In humans, the pulmonary circulation…
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Anatomy Physiology

The skin is the covering layer of the body. It has a protection function as is seen from the type of epithelium that its epidermis layer has. It has a stratified sqaumous keratinized epithelium, which is composed of several layers…
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How Breathing Works

Breathing is a necessary mechanism in the human body. A breath occurs in two parts, inhalation (or inspiration) and exhalation (or expiration). The breathing cycle is controlled by the nervous system, particularly the respiratory center of the brain, and respiratory…
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Therapeutic Cloning Issues

Since the cloning of Dolly the sheep in 1997, the tremendous potential of biotechnology has received increasing recognition. Currently, cloning has diversified into inter-related fields with the hope that it will provide a better future for mankind. However, with regards…
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How Kidneys Work

The kidneys maintain the pH, ion, and fluid balance of the blood. Humans usually have two of these bean-shaped organs in the abdominal cavity. To achieve their function, the kidneys are made of basic filtering units, called nephrons, intertwined with…
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Anatomy Physiology

The autonomic nervous system is divided into two parts.  These are: the sympathetic nervous system and the parasympathetic nervous system.  The sympathetic nervous system originates in the spinal cord at the levels T1 to L3 where T stands for the…
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