NOSE

is a cavity bounded below by the palate, above by the hase wg: = in front by gr hoe bones ~— cartilages, whilst be it opens into a part the dag or throat. The cavity is lined “Ss mucous mem which secretes mucus and thus the membrane moist. The nose 1s divided into a right and a left half by a partition, the “ nasal septum.” half is occupied by the three turbinal bones, which run age | from front to back, each being rolled ap like o Below each bone is a space, which fives pa age to the air. The purpose served by tho turbinal is to increase the surface of mucous membrane to which the air is exposed ia [s. 389]