GLANDS. 129 



The ovary is developed at the expense of the inte- Development, 

 rior substance of the Wolffian body, and is distin- 

 guishable -from a testicle, by not being continuous 

 with its excretory duct. It consists, at first, exclu- 

 sively of embryonic cells, the greater part of which 

 are transformed into the ovisacs ; the remainder form 

 the parenchyma and envelope of the organ. In the 

 ovaries of the foetus, or newly born infant, the ovi- 

 sacs are readily recognised as a series of pockets lined 

 internally by a layer of epithelial cells which sur- 

 round another larger central cell; this eventually 

 becomes the ovula, whilst those which surround it, 

 increasing in number, form the membrana granulosa, 

 and proligerous disc. 



The body of Rosenmuller, or parovarium, situated 

 between the layers of peritonaeum which connect the 

 ovary and fimbriated extremity of the Fallopian tube, 

 and consisting of a number of blind canals, represents 

 the remains of the central portion of the Wolffian 

 body, and corresponds to the vasculum dberrans in 

 the male. 



The liver is covered externally, on all sides, by a LlTer - 

 layer of connecting tissue which, at its transverse fis- 

 sure, applies itself to the vessels of the organ, and 

 following them into its parenchyma, accompanies 

 them in their ramifications, forming a common invest- 

 ment for them, and the whole organ, which is known 

 as the capsule of Glisson. 



The outer surface of this proper coat of the liver is 

 very closely united to the peritonaeum throughout its 

 whole extent, except at its posterior border, its trans- 

 verse fissure, and at the fissure for the gall-bladder. 





