FREE BOOKS

Author's List




PREV.   NEXT  
|<   75   76   77   78   79   80   81   82   83   84   85   86   87   88   89   90   91   92   93   94   95   96   97   98   99  
100   101   102   103   104   105   106   107   108   109   110   111   112   113   114   115   116   117   118   119   120   121   122   123   124   >>   >|  
ught to view by the removal of a section of the lower jaw.] 238. The PAROTID GLAND, the largest, is situated in front of the external ear, and behind the angle of the jaw. A duct (Steno's) from this gland opens into the mouth, opposite the second molar tooth of the upper jaw. -=-=-=-=-=-=-=-=-=-=-=-= 237. How many glands about the mouth? Give their names. What does fig. 58 represent? 238. Describe the parotid gland. -=-=-=-=-=-=-=-=-=-=-=-= 239. The SUBMAXILLARY GLAND is situated within the lower jaw, anterior to its angle. Its excretory duct (Wharton's) opens into the mouth by the side of the _frae'num lin'guae_, (bridle of the tongue.) 240. The _SUBLINGUAL GLAND_ is elongated and flattened, and situated beneath the mucous membrane of the floor of the mouth, on each side of the fraenum linguae. It has seven or eight small ducts, which open into the mouth by the side of the bridle of the tongue. _Observation._ In the "mumps," the parotid gland is diseased. The swelling under the tongue called the "frog" is a disease of the sublingual gland. [Illustration: Fig. 59. A side view of the face, oesophagus, and trachea. 1, The trachea (wind pipe.) 2, The larynx. 3, The oesophagus. 4, 4, 4, The muscles of the upper portion of the oesophagus forming the pharynx. 5, The muscle of the cheek. 6, The muscle that surrounds, the mouth. 7, The muscle that forms the floor of the mouth.] -=-=-=-=-=-=-=-=-=-=-=-= 239. The submaxillary. 240. The sublingual. What observation respecting these glands? What does fig. 59 represent? -=-=-=-=-=-=-=-=-=-=-=-= 241. The PHARYNX is a membranous sac, situated upon the upper portion of the spinal column. It extends from the base of the skull to the top of the _tra'che-a_, (windpipe,) and is continuous with the oesophagus. From the pharynx are four passages; one opens upward and forward to the nose, the second leads forward to the mouth, the third downward to the trachea and lungs, the fourth downward and backward to the stomach. 242. The OESOPHAGUS is a large membranous tube that extends behind the trachea, the heart, and lungs, pierces the diaphragm, and terminates in the stomach. It is composed of two membranes--an internal, or mucous, and a muscular coat. The latter is composed of two sets of fibres; one extends lengthwise, the other is arranged in circular bands. 243. The STOMACH is situated in the left side of the abdomen, immediately below and in contact
PREV.   NEXT  
|<   75   76   77   78   79   80   81   82   83   84   85   86   87   88   89   90   91   92   93   94   95   96   97   98   99  
100   101   102   103   104   105   106   107   108   109   110   111   112   113   114   115   116   117   118   119   120   121   122   123   124   >>   >|  



Top keywords:

situated

 

oesophagus

 

trachea

 
tongue
 
muscle
 

extends

 
parotid
 

represent

 

composed

 

stomach


forward
 

mucous

 

downward

 

membranous

 

bridle

 
sublingual
 

pharynx

 

portion

 

glands

 
windpipe

respecting

 
continuous
 

surrounds

 

column

 

submaxillary

 

spinal

 

observation

 
PHARYNX
 

pierces

 

lengthwise


arranged

 

fibres

 

muscular

 

circular

 

immediately

 

contact

 

abdomen

 

STOMACH

 

internal

 

fourth


backward

 

passages

 

upward

 

OESOPHAGUS

 

diaphragm

 

terminates

 
membranes
 

diseased

 

SUBMAXILLARY

 

anterior