Males are generally classified as mature based on the enlargement of vas deferens
and its physical appearance (milky white coloration).
In a second specimen there was a dense round structure located on the vas deferens
2,11,12) In patients with a BMI above 40, visualization and manipulation of the penis and scrotum may be seriously impaired (13); palpation of the vas deferens
may be difficult or impossible; and surgery may become protracted and complicated.
The mesonephric duct differentiates into the bladder trigone, the seminal vesicle, the ductus deferens
, and the distal two-thirds of the epididymis.
A transrectal ultrasound (TRUS) will determine if the seminal vesicles and vas deferens
close to the prostate are normal.
The spermatophores taken from the male posterior vas deferens
did not show dehiscence during 90 min of contact with seawater.
It is a little more tricky as the vas deferens
, the tube that carries sperm, is more difficult to identify, but then most acts of veterinary surgery are more demanding
After a local anaesthesia, the drug is injected in vas deferens
-- the vessel through which sperm moves.
Regarding males, spawning capable specimens with their vas deferens
full of sperm or actively spawning (with part of these vessels empty) were present almost all months of the year (Figs.
Monash IVF team reported the world's first pregnancy achieved by surgical sperm retrieval from a patient with bilateral vas deferens
ducts obstruction (6).
The epididymai tail and the vas deferens
were separated and placed in a petri dish containing 0.
Epiphallus extremely long and convoluted, its convolutions and those of vas deferens
enveloped in membranous covering of connective tissue and attached to lower spermoviduct and free oviduct; a short flagellum present at junction of vas deferens
and epiphallus; interior wall of epiphallus with one large longitudinal pilaster and 6 or 7 smaller longitudinal ridges, these continue into flagellum, evanescing near its tip; vas deferens
discharges into epiphallus via a pore situated on large pilaster; vas deferens
passing over and down lower sperm-oviduct to its origin at base of prostate; lumen of vas deferens
for the most part simple, but broadening just prior to junction with epiphallus, and inner wall with 3 longitudinal folds each with side branches.