THE MAMM.E 



1069 



great ]t;irt unstripi'il. Th(^ glands of Bartholin, althouj^h morphologically identical 

 with Cowpcr's <rlaiKls, arc less deeply placed. 



The greater development of the connective-tissue structures between the genital 

 canal and the third stage of the rectum, leading to the formation of the perinaeal 

 body, is also a peculiarity of the female (tig. (>1*J). The perinatal body is triangular 

 in sagittal section, and l)ounded in front l)y the vulvo-vaginal wall, behind by the 

 anterior wall of the rectum, and below Ity tlie integument between the posterior 



Flo. t;5(). — I)I.\GKA.MM.\TIC REPRESEXT.VTION OF THE PeRIN.EAL StKUCTUKES IX THE Fe.MAI.E. 



ISCHIO-PUBIC ARCH 



CRUS CUTORIDIS WITH 

 ISCHIO-CAVERNOSUS 



BULBO-CAVERNOSUS 

 COVERING BULBUS 

 VESTIBULI 



Superficial trian- 

 gular ligament 



/ ^ I ^ ;-;_ -. 



CLANS CUTORIDIS 

 WITH PREPUCE 



PARS INTERMEDIALIS 



'^ Mucous membrane 

 of vestibule 



MEATUS URINARIUS 



BULBUS VESTIBUU 



GLAND OF BARTHOLIN 



Sphincter ani 



vulvar commissure and the anal aperture. It consists of a strong meshwork of 

 connective tissue freely intermingled with fibres of elastic tissue and un.^trijted 

 muscle, and is traversed by the various muscles which meet at the tendinous 

 centre of the perinseum. It becomes stretched to a remarkable degree during the 

 ]»as.sage of tlie child's head in labour, but is saved from rupture by its strength 

 and elasticity. 



THE JIAJIJLE 



The mammary glands are two ]tt<toral organs wliich secrete the milk in tii<' 

 female, but remain permanently rudimentary and functionless in the male. 



The female mamma Tin which tenn is included the gland with its investing 

 integumentary structures) is .seen in its typical adult form as a more or less hemi- 

 spherical eminence upon the front wall of the chest over the third, fourth, hfth. 

 and sixth ribs, and extending transversely from the border of the sternum to the 

 anterior margin of the axilla. It is surmounted near its middle by a small wart- 

 like process, the mammilla or nipple, which lies in the centre of a circular area 

 of altered skin call( d the areola. 



The secreting organ consists of an aggregation of ten to sixteen eom]»ound 

 racemose glands, the ends of which oi)en separately upon the summit of the nipple. 

 These component elements are quite distinct in the di.-:sected breast as so many 



