84 THE CONNECTIVE TISSUES, BY A. ROLLETT. 



DISTRIBUTION OF THE FIBRILLAR CONNECTIVE TISSUE IN 

 MAN. In regard to this point, the parts that consist of fibrillar 

 connective tissue in man are the ligaments of the skeleton, the 

 periosteum, and perichondrium ; the aponeuroses, fasciae, and 

 tendons ; the fibrous membranes, the stroma of the serous mem- 

 branes, of the majority of mucous membranes, and of the skin ; 

 and the subserous, subcutaneous, and submucous connective 

 tissues : it occurs also in the tunics of the vessels, especially in 

 the tunica adventitia and in the endocardium, in the vascular 

 membranes of the eye, and of the central nervous apparatus, 

 and as interstitial connective tissue in most organs. 



DEVELOPMENT OF CONNECTIVE TISSUE. The question of the 

 development of fibrillar connective tissue is. one of the most 

 difficult in the whole range of histological inquiry. After 

 Henle* had opposed the view of Schwann,-f- that the cells 

 becoming greatly elongated split into the fasciculi of fibrils, 

 the view of the latter constantly gained ground, that an origi- 

 nally homogeneous substance, containing certain constituents, 

 distributed through it subsequently split into fasciculi and 

 fibrils. But the significance attached to the various forms and 

 material here met with by various authors was very different. 

 According to the view of Reichert,J the homogeneous sub- 

 stance which subsequently becomes converted into the fasciculi 

 and fibrils, proceeds from the coalescence of cell membranes 

 with an intercellular substance ; the fasciculi and fibrils are 

 only the optical expression of a duplicature of this substance, 

 whilst the cells, with their nuclei, or with the exception only of 

 their nuclei, undergo atrophy. According to another explana- 

 tion, it is not the blastema existing between the nuclei that 

 undergoes conversion into a fibrillar tissue, but the formed 

 elements between which this is so abundant as an intercellular 

 substance, and which are the fusiform cells demonstrated by 

 Schwann in embryonic connective tissue. The latter, again, ac- 



* Allgemeine Anatomic, p. 379. 



t Mikroskopische Untersuchungen uber die Uebereinstimmung,etc. Berlin, 

 1839, p. 133, et seq. 

 J Beitrage zu vergleichende Anatomic, etc., p. 108. 



