1072 DISSECTION OF THE ABDOMEN AND PELVIS. 



this time to be dissected. On removal of the skin, the dorsal arteries, vein, 

 and nerves, together with the suspensory ligament, will be brought into 

 view (pp. 428, 479, and 671). The corpora cavernosa, corpus spo igiosim, 

 and glans are then to be dissected ; and the glans may, with care, be sepa- 

 rated from the corpora cavernosa (p. 956). The pendulous portion of the 

 penis is to be cut across, the section examined, and the urethra slit open. 



The testicles and spermatic cord will next be dissected. The fascia 

 cremasterica is to be laid open, and the cremasteric branch of the epigastric 

 artery and genital branch of the genito-crural nerve found (p. 964). The 

 fascia propria is to be removed, and the elements of the cord examined, 

 viz., the vas deferens and the spermatic artery, veins, and nerves. The 

 testicle may then be removed, the tunica vaginalis opened, and the appear- 

 ance and relations of the epididymis and vas defereus noticed (p. 967). 

 The caput epididymis, in front of which will be seen the hydatid of 

 Morgagni, is to be raised from the tunica albuginea, and the epididymis 

 and coni vasculosi are to be dissected out. The tunica albuginea must then 

 be divided, and the arrangement of the tubuli seminiferi in the lobules made 

 apparent under water, and the mediastinum exhibited. 



4. Abdominal Cavity ; Peritoneum; Small Intestines, and Colon. The 

 cavity of the abdomen is to be opened by a vertical and a transverse incision 

 crossing one another on the left side of the umbilicus ; but the vertical 

 incision is, in the first instance, to be arrested at the umbilicus, in order 

 that the urachus and the fossae into which the peritoneum is thrown by the 

 obliterated hypogastric arteries may be examined. 



The peritoneal cavity, especially the pelvic part, is to be carefully 

 sponged out and all grumous fluid removed from it, and a piece of cotton 

 soaked with spirit is to be laid in the recto-vesical fossa ; on the adoption 

 of these precautions the practicability and comfort of the later parts of the 

 dissection materially depend. The general arrangement of the viscera is 

 first to be examined, including the position and relations of the stomach, 

 spleen, liver, duodenum, jejunum, ileum, ccacum and other parts of the 

 colon, the rectum, and the kidneys (p. 823). The folds of the peritoneum 

 are next to be studied (p. 826). This membrane should be followed trans- 

 versely and vertically throughout the abdominal cavity, and the line of 

 attachment of the mesentery to the wall of the abdomen should be dis- 

 played. The disposition of the foramen of Wiuslow and the great omentum 

 should then be investigated, and, in order that the interior of the sac of the 

 great omentum may be seen, a transverse cut should be made into it below 

 the arch of vessels which lies along the great curvature of the stomach, and 

 by this means the posterior surface of the stomach and the anterior surface 

 of the pancreas will also be brought into view. When the disposition of 

 the great omentum has been observed, the small or gastro-hepatic omentum, 

 the gastro-splenic omentum, the meso-colon, and the relations of the duo- 

 denum to the peritoneum will be easily followed. 



After the study of the peritoneum has been completed, the transverse 

 colon is to be lifted upwards, and the small intestines turned over to the 

 left side, in such a manner as to display the whole of the upper or right 

 side of the mesentery ; and the distribution of the superior mesenteric 

 artery, from the lower border of the pancreas downwards, with the accom- 

 panying vein and plexus of nerves, is then to be brought out by dissection 

 (pp. 410 and 702). 



From its right side the artery will be seen to give off the middle colic, 

 right colic, and ileo-colic branches, and from its left side about a dozen 



