1966 



HUMAN ANATOMY. 



FIG. 1673. 



Clans 



Distal end 

 of corpus 

 cavernosum 



Corpus cavernosum 



by the urethra and is marked by a median raphe, which is continuous with that of 

 the scrotum and, as the latter, indicates the line of fusion of the original components 



of the spongy body. 



The conical glans, which forms the distal end of the organ, is limited along its 

 oblique base by a prominent rounded border, the corona glandis, that runs downward 

 and forward from the dorsum towards the under surface and marks a groove (sulcus 

 retr oulaiidular is) that separates the glans from the body of the penis. The constricted 

 zone immediately behind the glans constitutes the neck (collum penis). In conse- 

 quence of the obliquity of the corona, the 

 dorsal expansion of the glans measures 

 about twice the length of its under sur- 

 face. 



The skin covering the pendulous 

 portion of the penis very thin, delicate, 

 and elastic, and possessing only fine 

 hair (lanugo) except in the immediate 

 vicinity of the pubes is loosely attached 

 over the body of the organ by subcu- 

 taneous tissue, devoid of fat, that permits 

 of ready movement of the integument. 

 Along the under surface of the organ 

 bundles of involuntary muscle closely 

 adhere to the integument and constitute 

 a stratum, the tunica darlos penis, that 

 resembles the similar layer of the scro- 

 tum. Just behind the corona the skin 

 forms a free duplicature, the prepuce or 

 foreskin (praeputium penis), that covers 

 the glans to a variable extent ( in children 

 and in some adults completely) and is 

 firmly attached by its inner layer to 

 the neck of the penis along a line about 

 3 mm. above the corona. From this 

 point the skin is prolonged over the 

 glans, to which it is intimately applied, 

 as far as the meatus, where the intt-gu- 

 ment becomes continuous with the ure- 

 thral mucous membrane. The lines of 

 reflection of the prepuce on the two sides 

 converge and finally meet along the 

 under surface of the glans in a sharp 

 median fold, theffrnum ( frenulum prae- 

 putii), that extends as far as the pos- 

 terior border of the slit-like urethral 

 opening. On either side of this fold a 

 shallow recess (fossa frenuli) extends the 

 preputial sac. The- skin lining the latter 

 and covering tin- glans is modified so 

 that it somewhat resembles a mucous membrane, as which it is often inaccurately 

 de-,.Til>ed. YVhil.- entirely devoid of hairs, small sebaceous glands are sparingly 

 distributed over the glans. corona, and inner layer of the prepuce. These, formerly 

 Mi|ip..sed tn In- c.i large size and named fat glands of 7V.w (lan<1ulae praepntiales), 

 ! imcttiou- material which, mixed with discarded' epithelial cells, may collect 

 in the groove behind the corona ,,s a cheesy substance, the stnr^nitt. 



Tin- corpora cavernosa i corpora cau-rnosa penis) are two cylinders of erectile 

 tissue, when relaxed about is an. (6 in. ) in length, that form the chief bulk of the 

 l.odv of the penis. Kach is enclosed within a dense- tihro-elastic envelope, or tunica 

 albuginta, which internally is continuous with the trabecula- between tin- blood- 

 s i'-" :inm '^ bo*t at the root ,,f the penis as the diverging pointed and then 



Urethra, cut 



Inferior hi\ < r 

 of triangular 

 ligament 

 Attachment of luilh, cut 



Dissi-iti.m < if )irtnV showing tlm-r rom|K>nent cylin- 



i-K.tilr tis-iu- ; <listal mil ill corpus spotiKiosuin. 



whh gbuw. hM been freed ami tuim-ii asid.-; attachment 



of uii tlnal luilti has IHTII rill ami htllh ilraun 



