File:Human physiology (1907) (14581683918).jpg

Identifier: cu31924031263597 (find matches)
Title: Human physiology
Year: 1907 (1900s)
Authors: Furneaux, William S
Subjects: Human physiology
Publisher: London New York : Longmans, Green
Contributing Library: Cornell University Library
Digitizing Sponsor: MSN

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
ot producemotion by their own contraction, but by their influence over themuscles in which their fibres terminate. The nervous system consists of two distinct parts, called thecerebrospinal and the syinpatfietic systems. The cerebro-spinal system consists of the brain, the spinalcord, and all the nerves given off from the brain and the cord.All the vertebrate animals possess such a system. The nervefibres of the cerebro-spinal system are distributed chiefly to theskin, thus giving us the sense of touch ; to the other organs ofsense—the nose, tongue, ear, and eye; and also to all the voluntarymuscles. The sympathetic or ganglionic system consists of a number ofganglia (knots) of nervous matter which give off nerve fibres. Thechief portion of this system comprises a double chain of ganglia, si-tuated one half on each side of the vertebral column, and extendingfrom the skull to the pelvis. It also includes various gangliawhich supply fibres to certain internal organs. The nerves of the
Text Appearing After Image:
Fig. 160.—The Cerebro-spinal Cavityand its Contents. f.t, o, frontal, temporal, and occipital portionsof cerebrum; c, cerebellum; mo, medullaoblongata: MS, upper and lower extremitiesof the spinal cord; ci, the first cervicalnerve; Dl, the first dorsal nerve; Li, thefirst lumbar nerve. Fig. 161.—The Sympathetic Chain of theBight Side, showing its connectionwith the principal Cerebro-spinalNerves. 176 ELEMENTARY PHYSIOLOGY sympathetic system are chiefly supplied to these organs and theblood-vessels, thus controlling the involuntary movements, andregulating the supply of blood to the various parts of the body. Herve substance or nerve tissue is either cellular ox fibrous. The cellular tissue is composed of branched cells togetherwith interlacing fibres, and, on account of its colour, is called greysubstance. It is found in the brain, the spinal cord, and in allthe other nerve centres. Fibrous nerve tissue is composed of fibres only, and is of twokinds—grey and white. The white fib

Note About Images