. Kirkes' handbook of physiology . Fig. 26.—Squamous Epithelium Scales from the Inside of the Mouth. X 260. (Henle.) columnar as they approach the lowest layer. In many of the deeper layersof epithelium in the mouth and skin, the outline of the cells is very irregular,in consequence of processes passing from cell to cell across these cells, figure 28, are termed prickle cells. These prickles are the in-tercellular bridges which run across from cell to cell, the interstices being filledby the transparent intercellular lymph. When this increases in quantity. wmL^w Fig. 27.—Vertica
. Kirkes' handbook of physiology . Fig. 26.—Squamous Epithelium Scales from the Inside of the Mouth. X 260. (Henle.) columnar as they approach the lowest layer. In many of the deeper layersof epithelium in the mouth and skin, the outline of the cells is very irregular,in consequence of processes passing from cell to cell across these cells, figure 28, are termed prickle cells. These prickles are the in-tercellular bridges which run across from cell to cell, the interstices being filledby the transparent intercellular lymph. When this increases in quantity. wmL^w Fig. 27.—Vertical Section of the Stratified Epithelium Covering the Front of the Cornea. Highlymagnified. (Schafer.) c. Lowermost columnar cells; p, polygonal cells above these; fl, flat-tened cells near the surface. The intercellular channels, bridged by minute cell processes, arewell seen. in inflammation the cells are pushed further apart, and the connecting fibrilsor prickles are elongated and more clearly visible. The columnar cells of the deepest layer are distinctly nucleated; theymultiply rapidly by division; and as new cells are formed beneath, they pressthe older cells forward, to be in turn pressed forward themselves toward the sur-face, gradually altering in shape and chemical composition until they die andare cast off from the surface. 28 CELL DIFFERENTIATION AND THE ELEMENTARY TISSUES Stratified squamous epithelium is found in the following situations: the epidermis, covering the whole of the external surface of the body;2. Covering the mucous membrane
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