INTRODUCTION 



one another, forming irregular spaces or meshes. These 

 little spaces, in health, are filled with fluid that has oozed 

 out of the blood vessels. 



22. Fatty Tissue. The connective tissue sometimes 

 becomes filled with fat. It is then called fatty or adipose 

 tissue. The fat is deposited as tiny drops of oil within the 

 tissue cells. The fat cells are- 

 then bound together by con- 

 nective tissue into little lumps, 



which we are able to find on 

 picking a bit of suet to pieces. 

 Fatty tissue is usually plen- 

 tiful beneath the skin, in the 

 marrow of bones, on the surface 

 of the heart, and in many other 

 parts of the body. 



23. Cartilage or Gristle. 

 Cartilage, or gristle, is a form of 

 connective tissue which under 

 the microscope is seen to consist 

 of a matrix or base in which cells 

 are imbedded, either singly or 

 in groups. It is tough, flexible, 

 and highly elastic. Sometimes 

 the base contains a network of 

 white or elastic fibers. 



24. Some Technical Words explained. It is plain that a 

 watchmaker would not be able to understand the working 

 of a watch unless he first made himself acquainted with its 

 various parts. So it is with the study of our bodies. We 

 must know something about their structure before we can 

 understand how they act and move, or, in one word, live. 



Connective Tissue from 

 a Lymphatic Gland. 



Consisting of a very fine network of 

 fibrils, around which are cells of 

 various sizes. 



