File:An academic physiology and hygiene (1903) (14778015821).jpg

Identifier: academicphysio00bran (find matches)
Title: An academic physiology and hygiene ..
Year: 1903 (1900s)
Authors: Brands, Orestes M. (from old catalog) Van Gieson, Henry C., (from old catalog) joint author
Subjects: Hygiene Physiology
Publisher: Boston, B. H. Sanborn & co
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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ated mainly inthe abdomen. 4. Beginning at the mouth, these organs, together withthe passages that connect them, form a long, muscular,membranous tube, called the alimentary canal, which inadults is from twenty-five to thirty feet in length, andextends throughout the trunk. It is lined throughoutwith firm, delicate tissue, similar to that of the internalcavities in general, and known as the mucous membrane.Besides the digestive juices which it secretes, it sends outa glutinous fluid, called mucus, which moistens and pro-tects the delicate lining, and enables its opposing surfacesto glide smoothly upon each other when brought in con-tact by the movements of digestion. The middle coat of 1 Long Life and How to Reach ft, in American Health Manual. DIGESTION. 195 the canal consists of two sets of muscular fibres, oneof which surrounds the tube like a series of rings, whilethe other extends longitudinally, or in the same directionas the tube itself, be it oesophagus, stomach, or intestine.
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Fig. 39. This figure represents the organs of the chest and abdomen in natural position, thebreast-bone and ribs being removed. EXPLANATION. B, the trachea or r windpipe). C, cesopluxgus or (gullet).Et diaphragm. F, liver.I, spleen. D, stomach.G, intestines. If, heart, the pericardium being laid open.A, I wigs.J, bladder. The outer coat is smooth and soft. The various portionsof the canal differ in form, size, and general structure. I96 ACADEMIC PHYSIOLOGY. 5. Finally the stomach and other organs situated inthe abdomen are invested by a sac-like membrane, theperitoneum (Gr. peri, around ; teinein, to stretch), whichattaches them to the vertebral column and to the walls ofthe abdomen upon which it folds back and which it lines.That part of the fold behind the intestines fastens itselfto the front of the vertebral column, and is called themesentery (mesos, middle ; enteron, intestine). 6. The processes of digestion may be classed as fol-lows : — 1. Mastication, 2. Insalivation, 3. Deg

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