. Rectal and anal surgery : with description of the secret methods of the itinerant specialists. e sphincter, andconstitute the longitudinalridges which are quite visiblein the livinjj state but whichare scarcely discernible in thepost-mortem relaxation. Thecircular muscular fibres lieinside the longitudinal ones,and are rather loosely con-nected to the latter, so thatthey often come down in pro-lapsus, leaving the longitudi-nal ones behind. As we de-scend, the lower porticm of thecircular fibres becomes muchthicker-, constituting what iscalled the intei-nal lower bortler termina
. Rectal and anal surgery : with description of the secret methods of the itinerant specialists. e sphincter, andconstitute the longitudinalridges which are quite visiblein the livinjj state but whichare scarcely discernible in thepost-mortem relaxation. Thecircular muscular fibres lieinside the longitudinal ones,and are rather loosely con-nected to the latter, so thatthey often come down in pro-lapsus, leaving the longitudi-nal ones behind. As we de-scend, the lower porticm of thecircular fibres becomes muchthicker-, constituting what iscalled the intei-nal lower bortler terminatesabruptly at an elastic ring offibrous tissue which forms the verge of the anus. Thefibrous ring may often be seen through the mucous mem-brane as a narrow and somewhat obscure whitish circlecalled Hiltons white line. Just above the verge of the anus some fascicles con-taining both muscular and fibrous tissue project as ridgesunder the mucous membrane and are called the columns ofMorgagni. In post-mortem relaxation they are obscure andspread out in a reticulated form, as shown in the upper. Fig. of the Male Peltis oor- BECTED FROM A FKOZEN CaDAVEB. R. The Rectum. B. The Blailder. K. of the peritoneum before amibehind a distended bladder. G. The Pros-tate. U. The Urethra. A. The Bulb of theUrethra. P. The Pubis. S. The Rectus Muscle, 4 RECTAL AND ANAL SURGERY. cut of Fig. 22, but in the living state the action of thespliincter compresses the bands laterally, so as to make themassume a perpendicular position. They then appear as shoii;longitudinal ridges closely crowded together, each about acentimetre long, and converging to an insertion into thefibrous ring of the anal verge. They are often described asmere folds or wi-inkles of the mucous membrane, but this isan error. By close inspection the delicate and translucentmucous membrane can be seen to glide loosely over the moresubstantial framework of the columns beneath, but conform-ing to thei
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Keywords: ., bookcentury1800, bookdecade1880, booksub, booksubjectanusdiseases
