| Show how the nose mose works in ordinary respiration the nose recognizes only pronounced odors since the filaments of the olfactory nerve are distributed only in the upper third of the lining membrane of its flossae and in ordinary breathing the th 2 air passes directly through the upper half of these cavities hence a modified respiratory effort a quick forced respiration or sniff is usually necessary in in order to bring air carrying odoriferous particles to the olfactory nerve endings nevertheless whenever air mixed with odorous gases and noxious particles is inhaled through the nose during a few successive ordinary respirations the olfactory sense is awakened to a knowledge of their presence through the law of diffusion of gases in virtue of which the odorous particles are conveyed to the superior flossae of the nose and hence to the terminal filaments of the olfactory nerve thus thu to a certain extent the sense of smell is preservative of heal health th dietetic and 1 benic gazette |
