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Seminal Vesicles
nThe paired seminal vesicles are located on the posterior surface of the urinary bladder adjacent to the ampulla of the
ductus deferens.
nEach seminal vesicle
is an elongated, pouchlike hollow organ approximately 5–8 centimeters long.
nIt is the proximal
portion of each seminal vesicle that merges with a ductus deferens to form the ejaculatory duct.
nThe seminal vesicles
secrete a viscous, whitish-yellow alkaline fluid
containing both fructose and prostaglandins.
nThe fructose is a sugar that nourishes the sperm as they travel through the female reproductive tract, while the
prostaglandins promote the
widening
and slight dilation of the external os of the cervix.