. The animans and man; an elementary textbook of zoology and human physiology. -; IX, glossopharyngeal;X, pneumogastrie; XI, spinal accessory; XII, hypoglossal; ncl, 1stspinal nerve. (After Martin.) The two long olfactory lobes project forward from in frontof the mid brain. The optic nerves arise from it. Posteriorto the mid brain lies the hind brain, consisting of the largewrinkled lobes of the cerebellum (fig. 179 A, c), lying appar- 3<5° THE ANIMALS AND MAN ently one on either side of the medulla oblongata. The twolobes of the cerebellum are connected by a mass of nervefibers called the
. The animans and man; an elementary textbook of zoology and human physiology. -; IX, glossopharyngeal;X, pneumogastrie; XI, spinal accessory; XII, hypoglossal; ncl, 1stspinal nerve. (After Martin.) The two long olfactory lobes project forward from in frontof the mid brain. The optic nerves arise from it. Posteriorto the mid brain lies the hind brain, consisting of the largewrinkled lobes of the cerebellum (fig. 179 A, c), lying appar- 3<5° THE ANIMALS AND MAN ently one on either side of the medulla oblongata. The twolobes of the cerebellum are connected by a mass of nervefibers called the pons varolii (fig. 179 A). The medulla ob-longata (fig. 179 A, mo) is continued ventrally into the FIG. 180. General plan of branches of trigeminal or fifth nerve. 1,small root of 5th nerve; 2, large root; 3, placed on bone above opthal-mic nerve, (with frontal, lachrymal and nasal branches); 4, superiormaxillary division; 5, inferior maxillary division; 6, chordi tympani;7, facial; A, lachrymal gland; B, lower jaw; C, sub-lingual gland; D,submaxillary gland. (After a sketch by Charles Bell.) The cranial -The twelve cranial nerves arisefrom the under side of the brain (fig. 179 B, I to XII). (i) The olfactory nerves arise from the anterior end ofthe olfactory lobes. These pass to the nasal passages andare the nerves of smell. NERVOUS SYSTEM 361 (2) The optic nerves pass to the eyes. They are the nervesof sight. (3) The oculo-motor nerves pass to certain muscles of theeyes. They are the nerves that partly control the move-ments of the eye-balls. (4) The paiheticus nerves go also to muscles of the eye. (5) The trigeminal nerve goes to different regions of theface and the sal
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