Textbook of normal histology: including an account of the development of the tissues and of the organs . sual arrangement is as several layers, constituting the stratified squamous variety. The isolated cells of such epi-thelium differ greatly in form, size, andappearance according to the layer fromwhich they are taken. The cells com-posing the deepest stratum are not scaly,but irregularly columnar, resting, withslightly expanded bases, upon the sub-jacent membrana propria. The irregularborders of these cells join with neighboringelements in such a manner that minuteintercellular clefts are fo
Textbook of normal histology: including an account of the development of the tissues and of the organs . sual arrangement is as several layers, constituting the stratified squamous variety. The isolated cells of such epi-thelium differ greatly in form, size, andappearance according to the layer fromwhich they are taken. The cells com-posing the deepest stratum are not scaly,but irregularly columnar, resting, withslightly expanded bases, upon the sub-jacent membrana propria. The irregularborders of these cells join with neighboringelements in such a manner that minuteintercellular clefts are formed; these areoccupied by the yielding cement-sub-stance, and allow the passage of thenutrient juices, as well as of the migratoryleucocytes, or wandering cells. The nuclei of the columnar elements are oval, and often situated nearer the outer ends of the cells. Passing from the basement-membrane towards the free surface, the form of the cells undergoes a radical change. The pronounced columnar type belongs to the deepest layer alone ; the cells next FlG- l8- become irregularly polyhedral, Fig. Squamous epithelium from frogsskin, viewed from the free surface.
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Keywords: ., bookauthorpiersolgeorgeageorgea, bookcentury1800, bookdecade1890
