The outlines of anatomy, physiology, and hygiene Being an edition of The essentials of anatomy, physiology, and hygiene, rev to conform to the legislation making the effects of alcohol and other narcotics upon the human system a mandatory study in public schools . n the tongue, but ithas been found, by careful experiments, that wecan perceive the flavor of substances also with thesoft palate and a small portion of the throat. Thetongue is a muscular organ of great mobility, and issupplied with three nerves from the brain. One of * An easy way to satisfy ones self of the deceptive nature of our
The outlines of anatomy, physiology, and hygiene Being an edition of The essentials of anatomy, physiology, and hygiene, rev to conform to the legislation making the effects of alcohol and other narcotics upon the human system a mandatory study in public schools . n the tongue, but ithas been found, by careful experiments, that wecan perceive the flavor of substances also with thesoft palate and a small portion of the throat. Thetongue is a muscular organ of great mobility, and issupplied with three nerves from the brain. One of * An easy way to satisfy ones self of the deceptive nature of oursensations, and of the fact that they must often be corrected by thejudgment, is this : Put one hand into cold water, and the other intowarm ; take them out quickly, and plunge them both into water a littlecooler than the warm water just used ; it will be found that this v/aterwill seem cold to one hand and warm to the other. TO UCH— TA S TE—SMELL. 277 these nerves presides over its motions, while theother two are sensitive nerves, one of which is dis-tributed to the anterior two thirds of the surface ofthe organ, and the other to the posterior portion(Fig. 63). The exact method in which these nervesterminate is not known, but the surface of the tongue. Fig. 63.—Diagram showing the distribution of the ner\-es of taste in the toneue. is covered with small papillae, which can be easilyseen with the naked eye, and the delicate extremi-ties of the nerves are known to terminate in thesepapillae. It is well known that no substance can beperceived by the taste unless it is soluble, and thisrenders it almost certain that the matter tastedcomes into actual contact with the end of thenerve. 356. The Sense of Taste.—The nerves of taste,in distinction from most nerves of special sense,also convey sensation like the nerves of generalsensibility. This fact makes it a little difficult todistinguish between things felt by the tongue andthings tasted. It is considered by many that there
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