GENERAL VIEW OF THE BODY n 



must be made up of separate or individual parts. These 

 must work together for the same general purpose, and, in 

 the accomplishment of this purpose, must practice the di- 

 vision of labor. That the body practices the division of 

 labor is seen in the related work of the different organs. 

 That it is made up of minute, but individual, parts will be 

 shown in the chapter following. That it carries on a gen- 

 eral work which is accomplished through the combined 

 action of its individual parts is revealed through an ex- 

 tended study of its various activities. The body is an or- 

 ganization. Moreover, it is one of the most complex and, 

 at the same time, most perfect of the organizations of 

 which we have knowledge. 



Summary. Viewed from the outside, the body is seen 

 to be made up of divisions which are more or less familiar. 

 Viewed internally, it is found to consist of different kinds 

 of materials, called tissues. The tissues are adapted, by 

 their properties, to different purposes both in the con- 

 struction of the body and in carrying on its work. The 

 working parts of the body are called organs and these in 

 their work combine to form systems. The entire body, on 

 account of the method of its construction and the character 

 of its work, may be classed as an organization. 



Exercises. i. Name and locate the chief external divisions of the 

 body. 



2. What tissues may be found by dissecting the leg of a 

 chicken ? 



3. Name the most important properties and the most important uses 

 of muscular tissue, osseous tissue, and connective tissue. 



4. Define an organ. Define a system. Name examples of each. 



5. Name the chief cavities of the body and the organs which they 

 contain. 



6. What tissues are present in the hand ? How does each of these 

 aid in the work of the hand ? 



