QUESTIONS AND ANSWERS 77 



Give the nerve supply of the salivary glands. 



Parotid : from the facial and inferior maxillary nerves. 

 Submaxillary : from the carotid plexus. 

 Sublingual : from the lingual and carotid plexus. 



Give the nerve supply of the larynx. 



Inferior and superior laryngeal from the pnemnogastric. 



Give the nerve supply of the spleen. 



Branches from the solar plexus. 



Give the nerve supply of the stomach. 



Pneumogastric and solar plexus. 



What is the nerve supply of the uterus? 



Branches from the small mesenteric and pelvic plexuses. 



Describe briefly the sympathetic nervous system. 



This extensive system, composed of nerves and ganglia, is de- 

 rived from the spinal cord and brain. It consists of two long cords 

 lying under the spinal column, from the head to the tail. Prom 

 the great niunber of ganglia along its course, there arise very fine 

 nerves which are distributed to the blood-vessels, viscera and glands. 

 The system is divided into cephalic, cervical, dorsal, lumbar and 

 sacral portions. 



Ganglia are distributed as follows: cephalic, three on the fifth 

 nerve (see above) ; cervical region, two, superior and inferior caro- 

 tid; dorsal, seventeen below the vertebrocostal articulations (most 

 important is the solar plexus) ; lumbar, six on the psoas parvus 

 muscle ; sacral, four beneath the sacrum. 



The function of the sympathetic system may be summarized 

 thus: 1, supplies the blood-vessels with constrictor and dilator 

 fibres; 2, supplies the viscera with motor and inhibitory fibres; 

 3, accelerator fibres to the heart ; 4, dilator fibres for the pupil ; 5, 

 secretory fibres for sweat, salivary and sebaceous glands ; 6, motor 

 fibres to the muscles of the hair ; 7, trophic fibres which exercise an 

 effect on the nutrition of a part. 



Digestive Oegans 



Name the organs of prehension, deglutition and digestion. 

 Prehension : lips, tongue and incisor teeth. 

 Deglutition : hard palate, tongue, pharynx and oesophagus. 

 Digestion: salivary glands, stomach, intestines, liver, pancreas 

 and teeth. 



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