VISCERAL ANATOMY. 1 43 



Fig. 24.— superior and general view of the genito-urinary apparatus in the male, 



WITH THE arteries. 



a, Left kedney; b, Right kidney; a,b, Ureters; c, c, Supra-renal capsules; d, Bladder; 

 E, E, Testicles; c, Head of the epididymus; (', Tail of theepididymus; F, Deferent canal; 

 G, Pelvic dilatation of the deferent canal; h, Left vesicula seminales; the right has been 

 removed, along with the deferent canal of the same side, to show the insenion of the 

 ureiers into the bladder; i, Prostate; j, Cowper's glands; k. Membranous, or intra-pelvic 

 portion of the urethal canal; l, Its bulbous portion; m, Cavernous body of the penis; 

 w, w. Its roots; n, Head of the penis, i, Abdominal aorta; 2, 2, Arteries renal) giving 

 off the principal capsular artery; 3, Spermatic artery; 4, Common origin of the umbilical 

 and arteries of the bulb; 5, Umbilical artery; 6, Its vesical branch; 7, Internal artery of 

 the bulb; 8, Its vesico-prostatic branch. 



Malpighian Bodies. 



These are small, round vesicles found in the cortex, lined with 

 cylindrical epithelium, and containing a tuft of blood vessels (the 

 glomerulus), also covered by epithelium. There are two open- 

 ings, — one, the beginning of* the uriniferous tubule, the other 

 opposite it, showing the entrance of a small artery and the emer- 

 gence of a vein, which afterward forms a plexus around the tube. 



Uriniferous Tubes. 



These are small canals running through the medullary structure 

 of the viscus, beginning at the Malpighian corpuscle, and ending 

 on the ridge of the pelvis. They are first single, but soon subdi- 

 vide into straight tubules, then descend into the medulla as the 

 loop of Henle, in a U shape, turn on themselves and run back to 

 the cortex. Then dilating, have several bends, pass down again 

 through the medulla, narrow and empty on the ridge of the pelvis, 

 as the convoluted Vaht. 



Structure, 



Amorphous basement membrane covered with flattened, poly- 

 gonal or polyhedral epithelium in different locahties. 



Vessels. 



The renal artery divides into several which give off branches to 

 cortex and medulla, glomeruli and tubes. 



The branches to the medulla descend between the tubes. 



The veins of the capsule are collected in a stellate manner, the 

 stars of Verheyen. They also form arches at the junction of the 

 cortex and medulla, and finally uniting form the renal vein. 



The nerves are from the solar plexus. 



