A text-book of diseases of the nose and throat / by D. Braden Kyle.

  • Kyle, D. Braden (David Braden), 1863-1916
Date:
1899
Catalogue details

Licence: Public Domain Mark

Credit: A text-book of diseases of the nose and throat / by D. Braden Kyle. Source: Wellcome Collection.

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    meatus, upper third of the surface of the middle turbinated bone, and the corresponding portion of the septum, the membrane is a yellowish pink ; below this, in the respiratory region, it is a light pink ; and at the posterior ends of the turbinates the tint becomes ■whitish. In the accessory cavities the color is a pale pink. It must, however, be borne in mind that in the entire surface the color depends upon the vascular condition, deepening in plethora, and in anemia becoming paler. So pale may it become in the latter condition as, even where the membrane is thin, to show a yellowish tint from the color of the underlying structures. Fig. 7.—Section of normal mucous membrane : e.c, epithelial cells ; 6., bosemeut mem- brane; c.t., connective tissue (submucosa); s.g., superficial gland ; m.(j., muciparous glands; «., artery cut transversely; d., duct; o.d.. orifice of duct; «.', artery cut longitudinally; r, open spaces from wbicli gland structure has fallen in mani])ulation of section. To the right of the figure is seen a large vein (cavernous sinus). (Author's specimen.) In .structure the membrane .shows three distinct comjionent parts. The upper layer is of epi- and hypoblastic origin, and is composed of varied epithelial elements which rest upon the second layer of basement membrane. This layer is in turn supjiorted by the third or sul)mucous layer, varying in thickness, composed of white