ANATOMY OF THE MALE ORGANS OF GENERATION 



69 



duct through which the semen is discharged into the prostatic portion of 

 the urethra. 



THE PENIS 



The penis (fig. 226) is the male organ of copulation. 



In a quiescent condition it is hidden away in a double fold of skin 

 termed the "sheath" or "prepuce", from which, in a state of erection, it 

 protrudes for some considerable distance. The posterior part of the organ 

 between the perineum and the scrotum, being somewhat closely bound down 



1, Transverse Section of Penis. I, Anterior Dorsal Arteries; A, Fibrous Capsule; B, Corpus Cavernosum; 

 c, E, Accelerator U rinse Muscle ; D, Urethra or urinary passage ; F, Retractor Penis Muscle; c, Corpus Spongiosum ; 

 H, Septum Pectiniforme. 2, Longitudinal Section of Glans Penis. J, Glans Penis divided ; K, Urethral Canal. 

 3, Penis unsheathed. L, Prepuce or Sheath; M, N, Mucous Membrane thrown into folds; 0, Glans Penis. 



to surrounding structures, is called the " fixed " portion. The rest, which 

 is enclosed in the sheath, and capable of being projected or withdrawn, is 

 the " free " portion. It commences behind in two branches or crurse, which 

 become attached to the ischial tuberosities, and after uniting pass forward 

 between the thighs, where it is suspended by a layer of elastic tissue, and 

 terminates in front in a rounded extremity enclosed by the glans penis. 



When in a state of erection it is seen to be covered by a thin moist 

 unctuous-looking membrane, which is a continuation of the loose skin 

 forming the inner fold of the sheath. At the extremity of the organ this 

 membrane is much reduced in thickness, and after closely investing the 

 " glans " enters the orifice of the urethra, and becomes continuous with its 

 mucous lining membrane. 



