. The microscope and its revelations. FIG. 778.—Detached epithelium-cells:a, with nuclei //, and nucleoli c,from mucous membrane of themouth. FIG. 779.—Ciliated epithelium :a, ivucleated cells resting ontheir smaller extremities; l>,cilia. their free extremities; and thus each has the form of a truncatedcone rather than of a cylinder, and such epithelium (of whichthat covering the villi of the intestine is a peculiarly good ex-ample) is termed conical. But between these primary forms ofepithelial cells there are several intermediate gradations ; and oneoften passes almost insensibly into th
. The microscope and its revelations. FIG. 778.—Detached epithelium-cells:a, with nuclei //, and nucleoli c,from mucous membrane of themouth. FIG. 779.—Ciliated epithelium :a, ivucleated cells resting ontheir smaller extremities; l>,cilia. their free extremities; and thus each has the form of a truncatedcone rather than of a cylinder, and such epithelium (of whichthat covering the villi of the intestine is a peculiarly good ex-ample) is termed conical. But between these primary forms ofepithelial cells there are several intermediate gradations ; and oneoften passes almost insensibly into the other. Any of these formsof epithelium may be furnished with cilia ; but these appendages aremore commonly found attached to the elongated than to theflattened forms of epithelial cells (tig. 77.). Ciliated epithelium isfound upon the lining membrane of the air-passages in all air-breathing Vertebrata ; and it also presents itself in many othersituations, in which a propulsive power is needed to prevent an ac-cimiulal ion of mu
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmicrosc, bookyear1901
