Identifier: physiologymanual00mann (find matches)
Title: Physiology : a manual for students and practitioners
Year: 1892 (1890s)
Authors: Manning, Frederick A
Subjects: Physiology
Publisher: Philadelphia : Lea Brothers
Contributing Library: Columbia University Libraries
Digitizing Sponsor: Open Knowledge Commons

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p and sides are sensitive to taste. The cen-tral portion of the dorsum is not an actively sensitive taste-organ.The under surface of the tongue is little if at all sensitive to taste. What nervous supply conducts the taste-sense ? Probably the glosso-pharyngeal. The lingual branch of thefifth (or gustatory) is also a conductor of taste-impressions forthe front of the tongue. Describe, roughly, the tongue. The tongue is a flattened muscular organ covered by epithelium.It is controlled by intrinsic and extrinsic muscles, which give it aremarkable flexibility of movement; the latter for its larger, andthe former for its more delicate, actions. What kinds of papillae characterize the mucous membrane of thetongue ?There are three varieties found, which are known as filiform^fungiform, and circumvallate papillae. These are set chiefly upon TASTE. 151 the dorsum of the tongue, and over its whole surface are numer-ous mucous follicles, whose secretions keep the tongue moist(Fig. 41). Fig. 41.
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A/. Upper Surface of the Tongue. Describe the filiform papillae of the tongue. The filiform papUhr. are set mostly upon the middle of thedorsum, but are scattered over the entire surface, and are far morenumerous than any other kind. They are conical in shape, andare covered with epithelium, which projects in a brush-like tuftfrom the apex. Their function is mostly tactile, and in animals,especially of the cat tribe, arc very prominent. 152 THE SENSES. Describe the fungiform papillae. They are chiefly distributed over the sides and tip of the organ,and sparsely upon the dorsum. They are larger at the surfacethan at the base, club-shaped, and are supplied with blood-vesselsand nerves. Their funx5tion is probably sensory. Describe the circumvallate papillae. They are somewhat similar in shape to the fungiform, but con-siderably larger. They are situated at the posterior portion of thedorsum in a V-shaped arrangement, and number only eight or ten.In the circumvallate papillse are the tas

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