THE VISCERA. 247 



substance itself is easily lacerable. M. transfers, prostate only exists in 

 muscular men. 



Artt. they come from A. vesical., htemorrhoid., media or vesicates. The veins 

 are numerous; its plexus is connected withjrf, vesical. and htemorrhoidalis. 



Nerves : they are branches of pi. hypogast. nerv. sympathid. 



481. 6. Cowper's glands, glandule Cowperi, 



are two irregular glands, the size of a pea and yellowish red, the 

 lobes of which, consisting of small fossae, open into two or three 

 excretory ducts, common to them all, which, after a passage of 

 one and a half to two inches on the inferior wall of the urethra, 

 penetrate, obliquely, the mucous membrane atthe commencement 

 of pars, cavernos. urethrse. They lie close before the prostate, 

 under the bulbus urethras [rather behind it] between the two m. 

 constrict, isthmi urethrse, surrounded by m. bulbo-cavernosi ; 

 and secrete a yellowish mucus. 



482. 7. The male organ, membrum virile, penis, virga, coles, 



is a cylindrical, spongy body, in a state of erection three-cornered 

 (and then eight inches long), on the inferior surface of which the 

 pars cavernosa [spongiosa~] urethrse is applied. Its posterior 

 extremity, radix s. crura penis, is thicker and attached on either 

 side to the pelvis ; its anterior extremity, nut, glans, pointed and 

 rounded ; its superior surface, dorsum, flattened and presenting a 

 longitudinal sulcus for vasa dorsalia penis ; its inferior surface is 

 convex, and presents the urethras in a deep groove. 



The penis consists of the corp. cavernosum penis, the pars 

 cavernosa urethrae with its corpus cavernosum [_spongiosum~], 

 the glans and muscles (which see). 



a. Corpus cavernosum (s. corpora cavernosa) penis, is a roundish body, spring- 

 ing with two roots from the internal surfaces of the rami ascend, oss. Ischii 

 (close above the tuber Ischii), which passes away from under the symphysis 

 pubis, where its roots lie close together, as far as the glans, into which its an- 

 terior rounded and smaller extremity projects, without communicating with 

 it. On its superior surface the vasa dorsalia penis pass, in its inferior deep 

 groove, the pars cavernosa of the urethra. A fibrous vertical partition, septum 

 penis, separates the two halves of the corpus cavernosum (hence the appella- 

 tion two corpp. cavernosa), which, however, are more or less connected together, 

 since the veins of the one pass over into those of the other side. 



Structure. The cavernous bodies consist of, 1. a thick, strong, and exten- 

 sible fibrous envelope, albuginea, from which a septum passes off in the cen- 

 tre; 2. of an erectile tissue, tela erectilis, which consists of cylindrical fasciculi 

 of uniting tissue, which cross each other very frequently; contain a blood- 

 vessel and form, with the processes (bands, trabecula) passing off from the 

 albuginea, cellular spaces. The small cells communicate with one another. 

 In them is placed a very convoluted vascular rete, the principal mass of 

 which is formed of veins which consist of tunica vasonun conununis, only. They 



