THE GENITAL ORGANS OF THE FEMALE. 989 



with blind extremities lined with ciliated cylindrical epithelium. It is considered 

 as the remains of the Wolffian body - a foetal structure that forms the epididymis 

 in the male, and has been named the orga?i of Rosenmiiller in the female. 

 Chauveau does not mention its existence in the domesticated animals, though 

 Leyh does. There is also the paroophoron, likewise found in the broad ligament, 

 and formed of small canals lined with cylindrical cells. This is supposed to be 

 a relic of the urinary portion of the Wolffian body.) 



2. The Fallopian or Uterine Tubes, or Oviducts (Fig. 535, 2). 



The Fallopian tube is a little flexuous canal, lodged in the broad ligament, 

 near its anterior border. It commences at the ovary by a free, expanded 

 extremity — the pavilion of the tube (or ostium abdominah), and terminates in the 

 cul-de-sac of the uterine cornu by opening into it (the ostium uterinum). Its 



Fig. 534. 



9 



SUCCESSIVE STAGES IN THE FORMATION OF THE CORPUS LUTECM IN THE GRAAFIAN 

 FOLLICLE OF A SOW (VERTICAL SECTION). 



a, The follicle immediately after the expulsion of the ovum, its cavity being filled with blood, and 

 no ostensible increase of its epithelial lining having yet taken place; at b, a thickening of this 

 lining has become apparent ; at c, it begins to present folds, which are deepened at d, and the clot 

 of blood is being absorbed and decolorized ; a continuance of the same process, as shown at e,f, g, h, 

 forms the corpus luteum, with its stellate cicatrix. 



canal at the middle is so narrow as scarcely to admit more than a very thin 

 straw, and its calibre is still less towards the uterine extremity ; near the ovary, 

 however, it is wide enough for the passage of a thick goose-quill. 



The orifice of the uterine extremity opens in a small and very hard tubercle. 

 The ovarian extremity, in all Mammalia, offers a very remarkable arrangement. 

 It opens into the peritoneal cavity, near the fissure of the ovary, and in the 

 centre of the expansion named the pavilion of the tube, which is also designated 

 the fimbriated extremity (or morsus diaboli). This pavilion is attached to the 

 external side of the ovary, and has a very irregular outline — notched, as it is, 

 into several lancet-shaped, unequal prolongations {fimbria), which float freely in 

 the abdomen. Here are, then, two important anatomical facts — the discontinuity 

 between a gland and its excretory duct, and the communication of a serous cavity 

 fvith the exterior. 



Structure. — The Fallopian tube is formed of a serous, a muscular, and a 



mucous tunic. The serous {external) is furnished by the broad ligament, and is 



derived from the peritoneum. The middle is formed of unstriped muscular fibres, 



which extend into the pavilion. (They are arranged as circular — internal, and 



65 



