Anatomy and Physiology of the Brain
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"The living human brain is a soft, shiny, grayish white, mushroom-shaped structure. Encased within the skull, it is a 3-pound (1.4-kilogram) mass of nerve tissue that keeps us alive and functioning. On average, the brain weighs 13.7 ounces (390 grams) at birth, and by age 15 grows to approximately 46 ounces (1,300 grams). The human brain is composed of 12 pairs of cranial brain nerves and up to one trillion nerve cells. One hundred billion of these are neurons, and the remainder are supporting (glial) cells."
Principles of Anatomy and Physiology, Harper Collins Publishing,1990
Human Anatomy and Physiology, 5th Ed, Wm.C. Brown Publishing,1990


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