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In plants, growth occurs in meristems, which are the site of repeated cell division of unspecialized cells. These cells ..

Circulation
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The circulatory system is key to the transport of vital biomolecules and nutrients throughout the body. Learn about the ..

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Growth and Development of a Human Baby

Upon fertilization, a zygote forms and develops into an embryo. This tutorial elaborates on the growth and development f..

Muscle
Muscle

Muscle cells are specialized to generate force and movement. Learn about the different types of muscle tissues in this t..

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Sleep and Dreams – Neurology

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

Physiological Homeostasis
Physiological Homeostasis

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