150 



CONNECTIVE TISSUE. 



corpuscles in that substance are closed alveoli, and the walls of 

 the alveoli are distinctly fibrous in character. 



The reticular myxomatous tissue of the lymph-ganglia is the 

 prototype of tumors termed Myxo-Sarcoma (Myxo-Myeloma). 

 The more advanced tissue of the character of the thyroid body 

 is found in all formations called lymph-adenoma. Some histolo- 

 gists claim that the connective tissue which surrounds the epi- 

 thelial formations in the kidneys, in the salivary glands, and the 

 connective tissue in the central nervous system, are reticular in 

 structure. M. Schultze found this structure in the retina. 



FIG. 50. RETICULAR MYXOMATOUS TISSUE OF THE MUSCLE-FASCIA 

 OF A HUMAN EMBRYO, Two MONTHS OLD. 



R, reticulum of plastids, or fibers with oblong nuclei at the points of intersection ; M, 

 striped muscle at an early stage of formation ; C, capillary blood-vessel; V, vein. Magni- 

 fied 500 diameters. 



(c) Myxomatous Tissue of the Umbilical Cord. Virchow discov- 

 ered in 1851 that the umbilical cord, formerly considered as a gela- 

 tinous formation (Wharton's jelly), is a regular mucoid tissue, 

 traversed by a delicate reticulum of branching cells, in the meshes 



