SYSTEMATIC SYNTHESIS OF TISSUES INTO ORGANS. 330 



994. THE DIGESTORY CANAL is DIVISIBLE into the 

 Mouth, Pharynx, CEsophagus, Stomach, Second Stom- 

 ach, and Colon. 



The Mouth. 



995. THE MOUTH is CONSTRUCTED of a framework 

 of the upper and lower jaws and the palate-bone, of the 

 teeth, of the lips and cheeks, of the tongue, of the sali- 

 vary glands, of the Amygdaloid glands, of the mucous 

 glands, and of the veil of the palate (soft palate). 



996. Remark. THE FORM, SIZE, AND POSITION OF THE JAWS have 

 been sufficiently well shown, and may be reviewed by looking at the 

 illustrative figures. The position of muscles moving the jaw may also 

 be re-examined. 



997. IN THE LOWER EDGE OF THE UPPER JAW, AND 



IN THE UPPER EDGE OF THE LOWER, sockets are wrought, 

 the sides of which are called the alveolar processes, that 

 are built up around the roots of the teeth, and are ab- 

 sorbed when the permanent teeth are removed, dimin- 

 ishing the width of the jaws by so much, and bringing 

 the chin and mouth nearer together, as seen in old people. 



998. The TEETH IN THE FIRST SET are 20 in number 

 (Fig. 224), succeeded by thirty-two permanent teeth: 8 

 incisors, 4 canine, 8 bicuspids (two pointed, pre, or small 

 molars), and 12 molar or grinding teeth. A front view 

 of one of each kind is shown by Fig. 225, and a side 

 view by Fig. 226. 



999. THE SECOND SET BEGIN TO GROW immediately 

 after the first teeth begin to be formed, the fangs of 

 which usually melt away to give place to the permanent 

 ones. 



1000. Remark. IF THE SECOND TOOTH BEGINS TO PUSH OUT BY THE 

 SIDE OF THE FIRST, the latter should be extracted to make room for the 

 former. The mouths of children should be often examined when the 

 second set are to be expected. 



994. Howis ? 995.IIowis ? 996. What said of-? 997. What is wrought ? 

 998. How many ? 999. When do ? 1000. What ? 



