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ejaculatory duct
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Medical illustration of the male reproductive system in cross-section, showing labeled anatomical structures such as the penis, testis, scrotum, prostate, urethra, seminal vesicle, and associated ducts and glands. Medical illustration of a sagittal section of the human male reproductive system, showing the prostate gland, seminal vesicles, urinary bladder, urethra, rectum, and associated ducts and glands, each labeled for anatomical reference.
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ejaculatory duct

anatomy
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History

ejaculatory duct, either of two hollow tubes, each formed by union of the ampulla of a ductus deferens (q.v.) and the excretory duct of a seminal vesicle (q.v.). The ducts, which open into the urethra about halfway through the prostate gland (q.v.), function to mix the sperm stored in the ampulla with fluids secreted by the seminal vesicles and to transport these substances to the prostate.