Physiology. 



which all animal bodies are composed, upon the vegetable 

 kingdom, which, in turn, draws its matter from the air and earth. 

 The flesh, fish, and insect or animalculae-eating animals, get 

 their food at second-hand from the vegetable kingdom. The 

 same elements enter into both carbon, oxygen, hydrogen, 

 nitrogen, chlorine, phosphorus, sulphur, sodium, calcium, potas- 

 sium, magnesium, &c. 



A, the mouth; 

 B, the lips; c c, 

 the mantle; D, the 

 stomach ; E, the 

 intestine ; F, its 

 extremity; G, part 

 oftheliver;H, the 

 heart; I, the ad- 

 ductor muscle; J, 

 the margin of the 

 breathing and feed- 

 ing organs; K, the 

 right lobe of the 

 mantle; N, N,-O, 

 O, vessels distri- 

 buted through the 

 mantle ; M, the 

 large canal con- 

 taining the breath- 

 ing and feeding 

 organs. 



Fig. 36. ORGANS OF THE OYSTER. 



Our muscular flesh is composed of the same elements as are 

 found in most vegetables, grains, and fruits carbon, hydrogen, 

 oxygen and nitrogen. The fat is carbon, hydrogen, and oxygen. 

 Bones have an addition of lime and phosphorus. The sheep 



