THE NERVES AND THEIR FUNCTIONS. 155 



Questions. How are the nerves classified? What nerves consti 

 tute the first order ? Why called nerves of specific sense*? Describe 

 the first or olfactory. Is it large in animals ?^ in fishes ? in whales ? 

 Describe the second, or optic. Do the fibres cross each other ? its 

 function ? Describe the auditory nerve. What nerves constitute the 

 second order ? Where do they arise ? Describe the third pair ; their 

 function ? Describe the sixth pair ; their function ? The ninth pair ; 

 their function HL.Wb.at compose the third order of nerves ? Describe 

 the fourth nerve \ its function ? Describe t^he seventh nerve ; its 

 functioa# A '*niS fi%h nerve ; its function -f^^stMuMn^&c. ? Des. 

 cribe the eighth pair of nerves. What are its three branches called ? 

 Describe the vagans ; the recurrent ; the phrenic ; the external 

 respiratory ? What does Sir Charles Bell say of the influence of this 

 order of nerves ? \fwhat compose the fourth order of nerves ? Why is 

 the fifth nerve classed with the regular nerves ? Where does its first 

 branch go ; its second ; its third ? What nerve is afiected in tic 

 doloreaux ; its function ? "Describe the spinal nerves ; their mode 

 of origin ; their distribution ? Why is the skin so sensible ? Has 

 any part of the body its own sensibility ? Illustrate this. How are the 

 spinal nerves classed ? What compose the fifth order ? What other 

 names for the ganglionic nerves ? Describe them. What is the func- 

 tion of the ganglionic nerves ? What hypotheses have prevailed in 

 relation to the functions of the nerves ? 



