. Quain's elements of anatomy . TERNAL SEXUAL ORGANS IN THE MALEAND FEMALE FROM THE INDIFFERENT TYPE (from Ecker). A, the external sexual organs in anembryo of about nine weeks, in wliichexternal sexual distinction is not yet es-tablished, and the cloaca still exists ; B,the same in an embryo somewliat moreadvanced, and in which, without markedsexual distinction, the anus is now sepa-rated from the uro-genital aperture ; C,the same in an embryo of about ten weeks,sho\ying the female type ; D, the samein a male embryo somewhat more ad-vanced. Throughout the figures thefollowing indications are
. Quain's elements of anatomy . TERNAL SEXUAL ORGANS IN THE MALEAND FEMALE FROM THE INDIFFERENT TYPE (from Ecker). A, the external sexual organs in anembryo of about nine weeks, in wliichexternal sexual distinction is not yet es-tablished, and the cloaca still exists ; B,the same in an embryo somewliat moreadvanced, and in which, without markedsexual distinction, the anus is now sepa-rated from the uro-genital aperture ; C,the same in an embryo of about ten weeks,sho\ying the female type ; D, the samein a male embryo somewhat more ad-vanced. Throughout the figures thefollowing indications are employed; ^c,common blastema of penis or clitoris ;to the right of these letters in A, theumbilical cord ; p, penis ; c, clitoris; cl,cloaca ; iig, urogenital opening ; a, anus ; Is, cutaneous elevation which becomes lalium or scrotum ; I, labium; s, scrcaudal or coccygeal otum ; CO, united by median fusion, of the scrotum in the male. The lips of the urogenitalfurrow, which in the female are converted into the nymphag, and in the maleunite as integument below the penis, are both at first precisely the same in allembryoes. In the open condition, which continues until the eleventh or twelfthweek, the parts appear alike in both sexes, and resemble very much the moreadvanced female organs. The mdiments of Bartholins or Con-pers glands is said, seen at an early period, near the root of the rudimentary clitoris orpenis, on each side of the genito-urinary passage. In the female, the two external folds of integument enlarge, so as to cover theclitoris as the labia majora. The clitoris itself remains relatively smaller, and thegroove on its under surface becomes less and less marked, owing to the openingout, and subsequent extension backwards, of its margins to form the nymplia;.The vascular bulbs, sunk more deeply in the tissues, remain distinct and sep
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Keywords: ., boo, bookcentury1800, booksubjectanatomy, booksubjecthumananatomy
