Elementary anatomy, physiology and hygiene for higher grammar grades . FiG. 23. — The jaws and the teeth; 1,2, incisors;3, cauine ; 4, 5, bicuspids; 6, 7, S, molars;ffl, vein; &, artery; c, nerve; (2, vein, artery,and nerve. [From Johownot and Bonton.] NUTRITION 93 passage tract all at once, but in succession, beginning at thepharynx. The first contracts and makes thesmaller, and thus pushesthe food on to be con-tracted upon by the nextband. This motion iscalled peristaltic same kind of motioncarries the food along thewhole extent of the ali-mentary canal. 7. OF THESYSTEM. ANATOMYDI
Elementary anatomy, physiology and hygiene for higher grammar grades . FiG. 23. — The jaws and the teeth; 1,2, incisors;3, cauine ; 4, 5, bicuspids; 6, 7, S, molars;ffl, vein; &, artery; c, nerve; (2, vein, artery,and nerve. [From Johownot and Bonton.] NUTRITION 93 passage tract all at once, but in succession, beginning at thepharynx. The first contracts and makes thesmaller, and thus pushesthe food on to be con-tracted upon by the nextband. This motion iscalled peristaltic same kind of motioncarries the food along thewhole extent of the ali-mentary canal. 7. OF THESYSTEM. ANATOMYDIGESTIVE(continued) The Stomach is a pouchwhich holds about a quartor three pints ; the open-ing between it and theesophagus, being near theheart, is called the cardia,and the one from thestomach into the intes-tines is the pylorus. Bothof these gateways aresupplied with circularmuscles which by con-tracting close the open-ing. The cardiac end ofthe stomach is the storage part, and the gastric juicesecreted by this end is somewhat different from thegastric juice secreted by the pyloric end, which does thework of churning and digesting the proteids (Fig. 25). Fig. 24.—Diagram ot the structure audsetting of a normal incisor toofh.[Biidecker.] L, cuticle of enamel;^, enamel; J), dentine with canaliculi;J, layer between enamel and dentine;£, border-line between enamel andcementum of neck; S, cementum ofneck; Ce, cementum of root; Z, layerbetween dentine and cementum; P,pericementum; A, arteriole of pulp,branching into capillaries; V, vein otpulp taking up capillaries ; iV, medu
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