Filiform Papillae
The epithelium covering the filiform papillae is extremely dense and thick, and projects from their sides and summits in the form of long, stiff, hair-like processes. Shown are two filiform papillae, one with epithelium, the other without. Labels: p, the substance of the papillae dividing at their upper extremities into secondary papillae; a, artery, and v, vein, dividing into capillary loops; e, epithelial covering, laminated between the papillae, but extended into hair-like processes, f, from the extremities of the secondary papillae.
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Human Digestive SystemSource
Baker, W. Morrant & Harris, Vincent Dormer Kirkes' Hand-book of Physiology, 13th ed. (Philadelphia: P. Blakiston's Son & Co., 1892) 331
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