A system of gynecology . al sphincter is a thin, pale, elliptical voluntarymuscle which surrounds the anal canal, having posteriorly a fibrousattachment to the coccyx, while anteriorly it is inserted into the peri-neal centre, where it appears to blend with the sphincter vagina?. has recently stated that the opposite fibres of the sphincter donot interlace in front of the anus, but run parallel to each other up totheir point of insertion, being simply kept in apposition by transverse 1 Op. at. ? For an able article on this subject by Kelaey the reader is referred to the N. Jour
A system of gynecology . al sphincter is a thin, pale, elliptical voluntarymuscle which surrounds the anal canal, having posteriorly a fibrousattachment to the coccyx, while anteriorly it is inserted into the peri-neal centre, where it appears to blend with the sphincter vagina?. has recently stated that the opposite fibres of the sphincter donot interlace in front of the anus, but run parallel to each other up totheir point of insertion, being simply kept in apposition by transverse 1 Op. at. ? For an able article on this subject by Kelaey the reader is referred to the N. Jour \ai for March, 1881. 200 THE ANATOMY OF THE FEMALE EEL VIC ORGANS. bands of fibrous Although this opinion seems to be supportedby many of the figures in anatomical works, the writer has not beenable to satisfy himself by his own dissections of its absolute relations of the sphincter to the perineal body belong properly tothe section which treats of that subject. Ellis also describes a delicate. Vertical Section through Lower End of Rectum (Ruedinger): 1, rectal mucous membrane: 2,line of separation between mucous membrane and skin of buttock; 3, fat ; 4, levator ani;5, 6, external sphincter; 7, internal sphincter; 8, 9, longitudinal muscular fibres interlacingwith those of sphincter; 10, terminations of longitudinal fibres; 11, circular fibres; 12,13,longitudinal fibres of muscularis mucosa subcutaneous layer of involuntary muscle that surrounds the anuswith radiating fibres (corrugator cutis ani). B. Minute.—The muscular coat offers nothing of particular interestmicroscopically, except near the anus, -where the longitudinal fibres *A laceration of the perineum through the sphincter involves, according to somewriters, simply a separation of the opposite halves of the muscle, and not an actuallaceration of its fibres. RECTUM. 201 interlace with those of* the sphincters and end just beneath the integ-ument of the anal region. The minute anatomy of the
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectwomen, bookyear1887
