22 



Mechanism of secretion. Blood as it passes through the arte- 

 ries, moves slower and slower. As it returns through the 

 veins it flows faster and faster. Why. Effect of this fact 

 upon nutrition and secretion. Slowness extreme in the 

 capillaries. 



Contrivances for retarding the blood in particular organs to 

 favor secretion. 



SECRETORY GLANDS. Their structure. Examples. 



Structure and functions of the liver. 



Multitude of organs employed in effecting simple purposes in 



in the more complex animals. 



Consequent necessity for a common bond of union or me- 

 dium of intelligence between the different systems and or- 

 gans. THE NERVOUS SYSTEM. Illustration Multitude 

 of actions concerned in digestion. 



From this point it is impossible to arrange the precise extent of 

 each particular lecture, or the exact number composing the course. 

 The heads are therefore noted without such division. 



What is a NERVE ? Its appearance and structure Its charac- 

 ter in the simplest animals that have nerves In medusa 

 In the earth-worm. 



Origin of nervous fibres in GANGLIA. 



Nervous system composed of cineritious, or gray matter, and me- 

 dullary matter. 



Nervous fibres all naked at their extremities, but generally enve- 

 loped in a coat of cellular membrane elsewhere, called the 

 NEURILEMA. 



Mode in which nerves form branches. 



Difference of the globular structure of cineritious and medullary 

 matter Blood-vessels of nerves. 



Functions and structure of ganglia In the leech In man. 



Position and structure of SPINAL MARROW Six long ganglions 

 associated into one Its membranes The PIA MATER fur- 

 nishing each spinal nerve with its neurilema, the cerous or 



