2 Veterinary Elements. 



by avoiding overwork or idleness of various organs, but 

 also the prevention of disease by preventing the inroad 

 of germs. The possession of a knowledge of the con- 

 struction of an animal (anatomy) is a valuable aid to 

 enable us to classify that animal as to its fitness for the 

 dairy or the block, the carriage or the lorry. 



The Life Unit the Cell. The animal body is a col- 

 lection of small masses of protoplasm known as cells. 

 Each cell has the property of nutrition (taking in food 

 and using it to build up the body) and reproduction 

 (propagating itself), and may be capable of motion. 

 Protoplasm is made up of the elements carbon, nitrogen, 

 oxygen, hydrogen, sulphur. Cells collected together for 

 special purposes form a tissue, e. g., bone, muscle, nerve, 

 vascular, etc. Through the union of cells we get nerves 

 and capillaries, and from cell excretions we have built 

 up connective tissues, bones and cartilage. 



Definition of Anatomy. The study of the form and 

 structure (conformation) of the animal body. 



There are several kinds of anatomy, referring espe- 

 cially to the methods used and the object sought, e. g. : 



Comparative Anatomy refers to the study of form and 

 structure of not only the horse, but the cow, pig, dog, 

 sheep, poultry and Man. 



Histology is another division of anatomy, the study of 

 which calls for the use of the microscope and consists of 

 the study of tissues, such as skin, liver, bone, lung, etc. 

 If the study is of diseased tissue, it is known as Patho- 

 logical or Morbid Anatomy. 



Surgical Anatomy is of value to the surgeon and does 

 not concern the agricultural student. 



