Male Accessory Ducts
Rete testis , vasa efferentia , epididymes and vasa deferentia ( or vas deferens ) are called the male accessory ducts These ducts store and transport the sperms from the testis to the outside through urethra .
The seminiferous tubules join at one end to form a network or rete testis from where vasa efferentia arise .
Epididymis is a mass of long narrow closely coiled tubule which lies along the inner side of each testis .
At the anterior end of the testis epididymis is called caput epididymis , in which the vasa efferentia opens . The middle part of the epididymis is known as corpus epididymis . The posterior end of the epididymis is called as cauda epididymis.
The vas deferens is a continuation of the cauda epididymis . It leaves the scrotal sac and enters the abdominal cavity through the inguinal canal.
The vas deferens curves over the urinary bladder where it is joined by duct from the seminal vesicle to form the ejaculatory duct . Vasa deferentia carry sperms.
Ejaculatory Ducts
They are formed by union of ducts from seminal vesicle and vas deferens . They pass through the prostate gland and join the prostatic part of urethra .
They carry sperms mixed up with secretion of seminal vesicle.
Urethra It is the urinary duct which originates from neck of urinary bladder and opens out , at the tip of penis . It also receives secretions of prostate and Cowper's glands.
It consists of three regions - prostatic urethra where prostate gland opens , membranous urethra at the urogenital diaphragm and the spongy penile urethra that passes through penis .
The urethra has two sphincters - internal sphincter of smooth muscle fibres at its beginning and external sphincter of striated muscles fibres around membranous part.
MANISH MEVADA
M.Sc, M.Phil, B.Ed
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