FUNCTIONS OF Nl TUITION AND RELATION. 25 



body, the brain which is /-'/<,. 

 continued downward in a 

 thick, whitish cord, called 

 the spinal marrow. It de- 

 scends along the back, and 

 communicates with the 

 principal nerves of the 

 body. (PageTZfig.tt} 



35. On cutting through 

 the ribs and opening the 

 bony cage, which anato- 

 mists call the thorax, and 

 which we commonly call the 

 chest or breast, we find the 

 heart (c.) and lungs, (P.P.) 



(AV<y. 1.) A fleshy partition, the aiafthraqm, separates the chest 

 from the belly or abdontrn, and in this latter cavity, are contained 

 the stomach, the intestines, the liver, the spleen, and many other 

 organs of less importance. 



36. These different organs fulfil very various functions ; some, 

 such as the mouth, the teeth, the stomach, the intestines, and the 

 liver, serve digestion ; others, such as the lungs, (pp) are designed 

 for respiration ; others again, the heart, (c.) for example, distribute 

 to all the organs, matter necessary for their nourishment, and 

 there are others again, the use of which is to enable us to appre- 

 ciate tastes, and smells, to hear sounds, to see what surrounds us, 

 to feel what touches us, and to transport us from place to place. 



37. These functions, in spite of their diversity, tend to two 

 principal objects, and are consequently divided into two classes : 

 the object of one class of functions is the preservation of Ike life 

 of the individual, and arc therefore denominated, FUNCTIONS OP 

 NUTRITION; the others place the animal in relation with all that sur- 

 rounds him, and, consequent ly, are culled FUNCTIONS OF RELATION. 



38. The functions of nutrition, as their name implies, all serve 

 in imparting nutrition to the animal, either by separating nutri- 

 tive matter from the productions of the earth, by modifying this 

 matter and by reducing it to a fluid or juice, Jit to be admitted 

 into the organs, or finally, by conveying into the substance ol 

 the organs this nourishing fluid, which, by its combinations, in- 

 sures their maintenance and favours their growth. Consequently. 



35. What is the thorax ? What does it contain? What separates the 

 thorax from the abdomen? What does the abdomen contain ? 



36. What is the use of these different organs? 



37. What is the chief objects of all these various functions ? 

 38 What is the object of the functions of nutrition ? 



