THE VISCERA. 241 



slightly curved, under the symphysis pubis, from the neck of the 

 bladder forwards and downwards, contracts by degrees and opens 

 into vestibulum vaginae. Above a venous plexus surrounds it 

 and ligg. pubo vesicolia; under the symphysis: the angle of the 

 united crura of the Clitoris; below it rests firmly upon the an- 

 terior wall of the Vagina. The external mouth, surrounded by 

 a small enlargement, lies about one inch under the Clitoris above 

 the entrance to the Vagina. Its mucous membrane presents 

 longitudinal folds, and the veins passing longitudinally, also, a 

 few openings of mucous crypts ; the external coat consists of a 

 thin layer of erectile tissue (like corp. cavernosum urethrse 

 virilis) and a thicker of circular muscular fibres (pubo-urethralis). 



474. The glandulse supra-renales, renes succenturiati, 



are two small (one inch high, two inches broad), flat, semilunar 

 shaped and spongy blood glands, which in the foetus and child 

 are larger than in the adult, and surround the superior extremity 

 of the kidneys like a helmet. 



The anterior surface of the right supra-renal capsule looks 

 towards the inferior surface of the liver, to the right of V. cava 

 inferior; that of the left touches the Pancreas and looks towards 

 thefundus of the stomach. The posterior surface is attached to 

 the superior part of the crus of the diaphragm, on a plane with 

 the tenth dorsal vertebra, and has the Nn. splanchnic, major and 

 gland, semilunare behind and close to it. The superior convex 

 border is thin, and looks upwards and inwards. The inferior 

 concave is thick and lies upon the kidney. The surface is sur- 

 rounded by a thin layer of adipose tissue (not by peritoneum) and 

 a fibrous coat. 



Structure. We distinguish a thick, external cortical substance, of a yellow 

 striped appearance; and a pultaceous, chestnut brown, medullary substance, 

 in the interior, which is penetrated by numerous vessels (veins). The lobes 

 perceptible upon the surface, only, are formed by the furrows for vessels. 



Vessels: very numerous; suprarenales, branches of phrenic, infer.; JLorta; 

 cceliaca renalis. Veins : give rise to the idea of a cavity in the supra renal 

 capsules; they pass into V. cava infer, (the right) and renalis (the left). 



Nerves : from plcx. renalis and solans. 



Function of the supra renal capsules unknown. 



475. The Genitals, Organs of Generation, Organa genitalia 



s. sexualia. 



I. Of the Male, Genitalia virilia, 



serve for the preparation, preservation, and excretion of the semi- 

 nal fluid, and are placed for the most part outside the pelvic 

 cavity. 

 16 



