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While learning and intelligence are associated with the functions of a conscious mind, sleep and dreams are activities o..

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Nutrients in the soil are essential to the proper growth of a land plant. This tutorial deals with the properties of soi..

Birth Control and Contraception
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Different pregnancy and birth control and contraception strategies are described. Read this tutorial to learn each of th..

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Sigmund Freud and Carl Gustav Jung

In this tutorial, the works of Carl Gustav Jung and Sigmund Freud are described. Both of them actively pursued the way h..

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Homeostasis of Organism Water Regulation

Osmoregulation is the regulation of water concentrations in the bloodstream, effectively controlling the amount of water..

Kidneys
Kidneys and Regulation of Water and Inorganic Ions

The kidneys are responsible for the regulation of water and inorganic ions. Read this tutorial to learn about the differ..