50 



THE TISSUES. 



stellate cells with fine anastomosing processes, forming an 

 open reticulum, the meshes of which are filled with a semi- 

 fluid mucinous matrix. It is a soft gelatinous tissue. It is 

 an embryonal or early stage of connective tissue, becoming 

 later more firm by the development of fibres in the intercel- 

 lular substance. It occurs in the umbilical cord and other 



FIG. 18. 



if ^'-ir *r&> -^m t 



Mucous or embryonic connective tissue (Bohm and Davidoff ). 



situations in the early embryo, but in the adult only in the 

 vitreous body of the eye and in mucous tumors. 



Areolar tissue (often somewhat ambiguously called "cellular 

 tissue ") is unloose network of white and yellow fibres con- 

 taining connective-tissue cells, fat-cells, wandering cells, and 

 blood and^ymphatic vessels (Fig. 19.) The open spaces, or 

 areolse (whence the name of the tissue), are filled with lymph. 

 It is a loose delicate shining tissue, widely distributed, found 

 ecially beneath the skin and mucous membranes, and 

 pjjrts to move somewhat upon each other. 

 of one or another constituent it passes 



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