. Compendium of histology. Histology. THE ORGANS OF SENSE. 237. Fig. 192.—Vertical section through the so-called papilla foliata of the rabbit. nerves of taste. Both systems of papillae occur in man, though the foliatae are subject to many individual variations. The change is great in mammalial animals. Cats have no papillae foliatae ; Guinea-pigs have no circumvallatae. We have now to examine the above nerve terminations more closely. They are more recent histological acquisitions (Loven, Schwalbe, and others). Complicated cup or bud- shaped organs, the so-called gustatory buds, have been met
. Compendium of histology. Histology. THE ORGANS OF SENSE. 237. Fig. 192.—Vertical section through the so-called papilla foliata of the rabbit. nerves of taste. Both systems of papillae occur in man, though the foliatae are subject to many individual variations. The change is great in mammalial animals. Cats have no papillae foliatae ; Guinea-pigs have no circumvallatae. We have now to examine the above nerve terminations more closely. They are more recent histological acquisitions (Loven, Schwalbe, and others). Complicated cup or bud- shaped organs, the so-called gustatory buds, have been met w i t h here. Large numbers of them oc- cur, as is distinctly represented in our Fig. 192, in the lateral walls of the papillae themselves, and in the inner surface of the surrounding mounds of mucous membrane. The gustatory bud (about mm. high in man) is an epithelial structure. It (Fig. 193) permeates the entire thickness of this layer, and its points lie free. We meet, in the first place, with flattened, lancet-shaped, pointed parietal cells (a). They stand like the staves of a barrel. Above, possibly running out into the finest ciliae, they surround a small opening. These supporting or cover cells (2 a) ensheath an inner cell forma- tion, belonging to the axis portion of the gustatory bud, the rod cell, or, as it has also (hypothetically, it is true) been called, the gusta- tory cell (2 b). Above, there is a sort of styliform or rod-shaped process. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Frey, Heinrich, 1822-1890; Cutter, George R. (George Rogers), b. 1840, tr. New York, G. P. Putnams sons
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