340 



HITCHCOCK'S ANATOMY 



605. Croups of*Sympathetic Ganglia— These ganglia 

 are grouped to ether according to the locality, to which their 

 branches are distributed. Thus we have the Cranial ganglia, 

 Cervical ganglia, Thoracic ganglia. Lumbar ganglia, and 

 Sacral ganglia. Besides these there are several large plex- 

 uses which have received distinct names, although a great 

 number of small ones have not received any names. Of the 

 most important ones we may name the Pharyngeal, in the 

 immediate vicinity of the Pharynx, the Cardiac lying upon 

 the heart, and the Solar, between the liver and stomach, or, 

 as is more commonly known, the pit of the stomach. 



606. The Solar Plexus —The Solar Plexus seems to be, 

 as its name implies, a sun or center for nervous power to the 

 intestines, since branches from this plexus accompany the ar- 

 teries to the vital organs, where they subdivide again and 

 again, and enter their coats and substance. 



FUNCTIONS OF THE NERVOUS SYSTEM 



607. The functions of the Nervous System are the most 

 important and delicate of any in the body. 1. The Brain 

 affords a seat and center for life and intellect. 2. The nerves 

 are inlets for all the senses to the sensorium or seat of sensa- 

 tion. 3. They are the medium of all the movements of the 

 body, voluntary and involuntary. 4. They establish and 

 maintain a sympathy between all the parts of the body, and 

 equalize all the vital forces. 5. They preside over the in- 

 voluntary functions, such as the circulation of the blood, di- 

 gestion, respiration, and reflex actions. 



608. Intellect and Will located in the Brain.— 

 Voluntary Movements dependent on the Brain.— 

 The whole Brain not essential. — The Intellect ancf 



605. How are the sympathetic ganglia grouped together? What is said of the sym- 

 pathetic plexuses? 606. Describe the solar plexus. 607. What are the five principal func- 

 tions of the nervous system ? 



