Textbook of normal histology: including an account of the development of the tissues and of the organs . ds are oval, flask-shapedbodies, embedded within the epithelium, occu-pying usually the entire thickness of the latter,with their long axes placed in general verticallyto the free surface of the epithelium. Eachtaste-bud consists of an enveloping layer ofgreatly-elongated epithelial cells, the corticalor tegmental cells, which form a completecovering, except over a small area correspond-ing to the superficial pole of the bud ; at thispoint a minute canal, the taste-pore, connectsthe interio
Textbook of normal histology: including an account of the development of the tissues and of the organs . ds are oval, flask-shapedbodies, embedded within the epithelium, occu-pying usually the entire thickness of the latter,with their long axes placed in general verticallyto the free surface of the epithelium. Eachtaste-bud consists of an enveloping layer ofgreatly-elongated epithelial cells, the corticalor tegmental cells, which form a completecovering, except over a small area correspond-ing to the superficial pole of the bud ; at thispoint a minute canal, the taste-pore, connectsthe interior of the bud with the surface of themucous membrane. Within the epithelial capsule lies a group ofhighly-specialized elements, the gustatorycells. These neuro-epithelial elements appearas spindle, rod-like, or forked cells, each being possessed of an oval nucleus situated about the centre of the elon-gated body. The peripheral or outer ends of these cells are usuallyprolonged with fine pointed extremities, some of which terminate instiff hair-like processes projecting within the taste-pore almost as. Taste-bud from circumval-late papi la of child. Theoval structure is limited tothe epithelium (e) lining thefurrow, encroaching slightlyupon the adjacent connec-tive tissue (_/?); o, taste-porethrough whicli the taste-cellscommunicate with the mucoussurface. jc6 NORMAL HISTOLOGY. far as the free surface. The inner or central ends of the gustatory-cells are prolonged as slender, sometimes forked, processes ; theminute swellings or varicosities which these extensions often exhibitare supposed to indicate the direct connection of the neuro-epithelialcells with the fibres of the nerve of the special sense of taste. Itmust be remembered, however, that no such continuity has been oris likely to be demonstrated. The submucous and interfasciculartissue of the tongue contains numerous glands, both of the mucousand of the serous type. The mucous glands resemble those ofother parts of the ora
Size: 1201px × 2081px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorpiersolgeorgeageorgea, bookcentury1800, bookdecade1890
