The essentials of health. A text-book of anatomy, physiology, hygiene, alcohol, and narcotics (1892) (14592872408)

Identifier: essentialsofhea00stow (find matches)

Title: The essentials of health. A text-book of anatomy, physiology, hygiene, alcohol, and narcotics

Year: 1892 (1890s)

Authors: Stowell, Charles H(enry), 1850- (from old catalog)

Subjects: Physiology

Publisher: New York, Boston (etc.) Silver, Burdett & company

Contributing Library: The Library of Congress

Digitizing Sponsor: The Library of Congress

Text Appearing Before Image:

by a delicate connective tissue. Eachnerve fiber extends the whole length of the nerve, fromits beginning in the brain or spinal cord to itstermination. The Brain. The brain is well protected in the cranialcavity. It is surrounded by three distinct membranes,of which the middle one is capable of secreting a fluid.The membranes protect the brain from friction againstthe bony walls, while the watery secretion gives it somefreedom of motion. The brain is well supplied withblood vessels, — large arteries entering the base of theskull with the spinal cord. The weight of the brain depends partly upon the sizeof the individual, and partly upon his intellectual capa-city. The average weight of the brain of an adult maleis a trifle over three pounds, 49; or 49; ounces. Thebrain of Cuvier, the naturalist, weighed over 64 ounces, 17 258 THE ESSENTIALS OF HEALTH. and the brain of Daniel Webster weighed 63\ ounces.The brains of idiots are very light, weighing from 27ounces to as low as 8 ounces.

Text Appearing After Image:

Fig. 91. Side view of the whole human brain: (1) cerebrum ; (2) cere-- bellum ; (3) medulla. While it is true that many noted men had large brains,it is also true that some equally as noted had smallbrains. Yet it can be safely asserted that, as a generalrule, the larger the brain the greater the capacity forintellectual power; but to this statement there are somestriking exceptions. It appears that there is somethingbesides quantity necessary for the highest mental capa-bilities. This may be called quality, or some peculiarityof the brain material whereby it renders its possessorcapable of great intellectual attainment. The brain is divided into the cerebrum, the cerebel-lum, and the medulla oblongata. The Cerebrum, The cerebrum is the brain proper. It THE NERVOUS SYSTEM. 259 is the part above the ears, and is familiarly known asthe greal brain. It is believed that the cerebrum is theorgan of the mind ; that it is here we think, know, andreason. The cerebrum is divided into two parts

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1892

Library of Congress

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