File:Anatomy, physiology and hygiene for high schools (1900) (14778303171).jpg

Identifier: anatomyphysiolo00hewe (find matches)
Title: Anatomy, physiology and hygiene for high schools
Year: 1900 (1900s)
Authors: Hewes, Henry Fox, 1867-
Subjects: Physiology Health education (Secondary) Human anatomy
Publisher: New York : American Book Company
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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is poured into the mouth from theorifices of the ducts of three pairs of glands, the parotid (Greekpara, near, and ous, ear), the suhmaxiUary (Latin sub, un-der, and maxilla, jaw ), and the suUingual (Latin sub, un-der, and limjua, tongue) glands, situated in the tissues ofthe throat and neck. The parotids, just below and in frontof the ears, are the glands which are swollen in the mumps. Mastication (Latin masticare, to chew). The work ofthe mouth in digestion is principally a mechanical one. Bymovements of the lower jaw the food is broken up betweenthe teeth. This is called mastication. The food by the sameprocess is thoroughly mixed with the saliva and softened.This food is then collected by the action of the tongue and THE NUTRITION OF THE BODY 97 cheeks and thrust into the back of the mouth. By the con-traction of the muscular walls of the fauces, the bolas, or ball(Greek hoJos, ^a mass), of food is then squeezed into thepharynx, the soft palate, or uvula, a tissue curtain which
Text Appearing After Image:
Dissection of face, showing parotid gland with duct leading tothe cavity of the mouth, and submaxillary gland. p, parotid; sm, submaxillary; d, duct of parotid; n, nerves (branches of facial);/, artery of the face. you can see hanging from the roof of the mouth at its pos-terior end, being raised. The pharynx is a cavity connecting the mouth with theesophagus. The uvula (Latin uva, grape ) shuts it off fromthe mouth. Above it is entered by the posterior openings of 98 PHYSIOLOGY AND HYGIENE the nose cavities, at the sides by the Eustachian tubes con-necting with the middle ear, in front below by the larynx,behind by the esophagus. The epiglottis (Greek epi, upon,and glottis, glottis) is a fold of tissue which extends fromthe walls of the larynx aeross the opening from the pharynxto the larynx, and shuts off the larynx and windpipe fromthe pharynx while food is passiug. When not perfectlyclosed the food may get into the windpipe. This is whatoccurs when food goes the wrong way. Degluti

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