A text-book on diseases of the ear, nose and throat . on of their muscular coats, a large amount of ANATOMY AXD PHYSIOLOGY OF THE XOSE AXD XASOPHARYXX. 23: blood is retained in them, which in cooling warms the respired air. Thiswarming of the air is sui)posed by some to be the function of the erec-tile tissue. There is no analogy as to structure between the tissue of thel^enis and the erectile tissue of the nose. The olfactory mucous membrane found in the regio olfactoria—aregion placed by most authors on the upi)er surface of the middle tur-binate and opiDOsite wall of the sei^tum—has a pecul
A text-book on diseases of the ear, nose and throat . on of their muscular coats, a large amount of ANATOMY AXD PHYSIOLOGY OF THE XOSE AXD XASOPHARYXX. 23: blood is retained in them, which in cooling warms the respired air. Thiswarming of the air is sui)posed by some to be the function of the erec-tile tissue. There is no analogy as to structure between the tissue of thel^enis and the erectile tissue of the nose. The olfactory mucous membrane found in the regio olfactoria—aregion placed by most authors on the upi)er surface of the middle tur-binate and opiDOsite wall of the sei^tum—has a peculiar histological struc-ture. The epithelium is composed of columnar epithelial cells withbranching base and a large nucleus. Between these epithelial cells,called supporting cells, are found the nerve-cells of the special sense ofsmell, or olfactory- nerve-cells. The supi)orting cells are not ciliated, butend above in a flat membrane called the membrana limitans, while theolfactory cells terminate in a little bunch of from six to eight hair-like. Transverse section through the olfactory mucous membrane of a man of thirty. (Hej-mann, aftervonBraun.) 1, Bowmans glands stained with silver; 2,2, olfactorj-fibres, one of which is in connectionwith an olfactory cell (o) ; 4. basement cells. processes which project above the surface of the limiting olfactory cells are connected directly with a fibre of the olfactorynerve. They have a large nucleus, which gives the cell-body a spindleshape. Underneath the top layer of supi^orting cells are several layersof epithelial cells, called basal cells, of structure like the supporting is probable that the olfactory mucous membrane has no ciliatedepithelium. The upper ends of the supporting cells have a yellow pigment, whichhas given to the olfactory region a yellow color and the name locus connective-tissue cells of the stroma beneath the epithelial layer inthe olfactory region also have a yellow pigmentatio
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