A system of human anatomy, general and special . des ofthe bladder to the internal abdominal rings, and the two posteriorwith the course of the umbilical arteries, to the fundus of the organ. The bladder is composed of three coats, an external or serous coat,a muscular and a mucous coat. The serous coat is partial, and derivedfrom the peritoneum, which invests the posterior surface and sides ofthe bladder, from about opposite the point of termination of the twoureters to its summit, whence it is guided to the anterior wall of theabdomen by the umbilical ligaments and urachus. The muscular coat
A system of human anatomy, general and special . des ofthe bladder to the internal abdominal rings, and the two posteriorwith the course of the umbilical arteries, to the fundus of the organ. The bladder is composed of three coats, an external or serous coat,a muscular and a mucous coat. The serous coat is partial, and derivedfrom the peritoneum, which invests the posterior surface and sides ofthe bladder, from about opposite the point of termination of the twoureters to its summit, whence it is guided to the anterior wall of theabdomen by the umbilical ligaments and urachus. The muscular coatconsists of two layers, an external layer composed of longitudinalfibres, the detrusor urinae; and an internal layer of oblique and trans-verse fibres irregularly distributed. The anterior longitudinal fibrescommence by four tendons (the tendons of the bladder, or of the de-trusor urinae), two superior from the ossa pubis, and two inferior fromthe rami of the ischia on each side, and spread out as they ascend 564 BLADDER—LIGAMENTS. Fig. 219.*. upon the anterior surface of the bladder to its fundus; they then con-verge upon the posterior surface of the organ, and descend to itsneck, where they are inserted into the isthmus of the prostate gland,and into a ring of muscular tissue, which surrounds the commence-ment of the prostatic portion of the urethra. Some of the anteriorfibres are also attached to this ring. The lateral fibres commence atthe prostate gland and the muscular ring of the urethra on one side,and spread out as they ascend upon the side of the bladder to descendupon the opposite side, and be inserted into the prostate and oppositesegment of the same ring. Two bands of oblique fibres are describedby Sir Charles Bell, as originating at the terminations of the ureters,and converging to the neck of the bladder; the existence of thesemuscles is not well established. The fibres corresponding with thetrigonum vesicae are transverse. It has been shown by Mr. Guthrie,f th
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectanatomy, bookyear1847
