. Cunningham's Text-book of anatomy. Anatomy. THE TONGUE. 1127 papilla is composed of a conical projection of the corium, beset with microscopic papillae like those of the skin, and covered by a thick long cap of stratified squamous epithelium. In many of them the cap of epithelium is broken up into several long slender hair-like processes, giving rise to the variety known as filiform papillae. The cap of epithelium is being constantly shed and renewed, and an excessive or diminished rate of shedding or renewal, coupled with the presence of various fungi, gives rise to the several varieties of
. Cunningham's Text-book of anatomy. Anatomy. THE TONGUE. 1127 papilla is composed of a conical projection of the corium, beset with microscopic papillae like those of the skin, and covered by a thick long cap of stratified squamous epithelium. In many of them the cap of epithelium is broken up into several long slender hair-like processes, giving rise to the variety known as filiform papillae. The cap of epithelium is being constantly shed and renewed, and an excessive or diminished rate of shedding or renewal, coupled with the presence of various fungi, gives rise to the several varieties of " tongue " found in different diseases. The conical papilla? are longer and larger than the filiform, and have a wider base. They are situated on the dorsum among the filiform papillae, and resemble them in their structure. The conical and filiform papilla? are probably of a prehensible or tactile nature, and are highly developed, and horny, in carnivora. The fungiform and lenticular papillae (Fig. 890) are larger and redder, but less numerous than the first variety, and they are found chiefly near the tip and margins of the tongue, comparatively few being present over the dorsum generally. Taste-bud Serous glan 11 4j | Epithelium covering ! â ';â¢: papilla of corium Vallum around papilla Epithelium of summit of vallate papilla Loose epithelium on surface of papilla conica Stratified epi- thelial cap Connective tissue \ corium V #111 §Y' V-;$ f*t % IwM' wM %. Olandula liugualis A Muscle tissue Blood-vessel Fig. 891. A. Section of a papilla vallata of tongue. B. Section of papillae conicee of tongue. Each is in shape like a " puff-ball" fungus, consisting of an enlarged rounded head, attached by a somewhat narrower base. As in the case of the conical papillae, the corium is studded over with microscopic papillae, which are buried in the covering of squamous epithelium and do not appear on the surface. Most of the fungiform papillae, if not all,
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1914
