a uterus masculinus (u.m.). The essential sexual organ is the testis
(T.), a compact mass of coiling tubuli, which opens by a number of
ducts, the vasa efferentia, into a looser and softer epididymis (ep.),
which sends the sexual product onward through a vas deferens (v.d.),
to open at the base of the uterus masculinus. The urinary bladder and
ureters correspond with those of the female, and the common
urogenital duct (= vestibule), the urethra, is prolonged into an erectile
penis (P.) surrounded by a fold of skin, the prepuce. A prostate gland
(pr.), contributes to the male sexual fluid. The character of the
essential male element, the spermatozoon, the general nature of the
reproductive process, will be conveniently deferred until the chapters
upon development are reached.
9. _Classificatory Points_