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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t touches us, but also the char-acter of the object, whether hard or soft or rough. This sense is most delicate at the tips of the fingers, thetip of the tongue, and on the face. It is least delicate uponthe back, owing to the smallernumber of tactile corpusclesthere and the thicker epider-mis. If we place the two pointsof a compass one tenth of aninch apart upon the tip of thefinger or tongue, we can feeleach point; upon the back, thepoints even two inches apartfeel as one point. The sense of temperature al-so is placed in the skin. Thissensation arises from specialorgans distinct from those oftouch.^ The fact that thesesensations of touch, pain, andtemperature, which are receivedin the skin, are carried by sep-arate nerve fibers, is demon-strated by certain diseases.Thus, there is a disease of thespinal cord in which the patient nir^l^r^.^^t^m^loses the sense of pain, but not that of touch, in a certain part; also one in which the senseof touch is lost, while that of pain is intact.
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1 This sense can be cultivated. The blind by training acquire a very delicate sensewhich enables them to.distinguish by touch objects which to our sense are alike. 242 PHYSIOLOGY AND HYGIENE Taste. The organs of the sense of taste are located in themncous membrane of the tongue and pahxte. This mem-brane is raised into numerous elevations, or papillae. Inthese papillae are the endings of the nerves of taste. The papillaB are of three kinds. The Jiliforni (hsitui filum,thread, smd forma, form) papillae are long and slender,and placed over the front of the tongue. They contain theorgans of the sense of touch in the tongue. The fungiform(Latin fungus, mushroom ) papilla? are mushroom-shaped,with broad crowns and slender stems. The circunivallate(Latin c/rc?r»^, aroiuid, and valJuni,^^Si trench) papillaeare large mound-shaped papillae with a ditch or moat about them. They are sit-~\YZZ^^^^^^^J~—^^^T^^^^^^yr uated in double rows,^ ^^ forming a V on the back of the tongue.These fungiform

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