Normal histology : a manual for students and practitioners / by John R. Wathen.

  • Wathen, John Roach, 1872-
Date:
[1905]
Catalogue details

Licence: In copyright

Credit: Normal histology : a manual for students and practitioners / by John R. Wathen. Source: Wellcome Collection.

    62/232
    The fungiform papillae are less numerous, found on all parts of the upper surface of the tongue, chiefly at the apex and sides. They are lower and broader than the filiform, hav- ing a rounded apex covered with secondary projections and attached to the surface by a constricted base. The epithelial covering does not, as in the filiform, become cornified, nor is it quite so thick, but with a rich blood-supply immediately beneath the thin epithelium they are distinguished by their Fig. 50. Circunivallate papillae of rabbit: p, fibrous core of papilla; g, taste-buds; 71, nerves ; a, gland of Ebner. (Ranvier.) red color, and by their outline, which resembles a mushroom, whence their name is derived. The eircumvallate ]iapillfe are eight to ten in number, situ- uated at the base of the tongue, being arranged in a V-shaped fashion just anterior to the foramen ctecum. They resemble the fungiform except that they are larger, are constricted at their base, and more flat on top, lying in a cup-shaped depres- sion in the mucous membrane ; the mucous membrane form- ing a sort of ridge or wall around them. On the side-walls