Either of a pair of glandular pouches that lie one on either side of the male reproductive tract posterolateral to the urinary bladder and in the human male secrete a sugar- and protein-containing fluid into the ejaculatory duct.
Comment:
[function-note] "The seminal vesicles secrete a significant proportion of the fluid that ultimately becomes semen. Lipofuscin granules from dead epithelial cells give the secretion its yellowish color. About 50-70% of the seminal fluid in humans originates from the seminal vesicles, but is not expelled in the first ejaculate fractions which are dominated by spermatozoa and zinc-rich prostatic fluid."; [homology-note] "(In mammalian testis) Along the way (the sperm travel), three accessory sex glands, the seminal vesicle, prostate, and bulbourethral (Cowper's) gland, respectively, add their secretions as sperm move from the testes to the urethra.[well established][VHOG]" xsd:string {date_retrieved="2012-09-17", external_class="VHOG:0001379", ontology="VHOG", source="ISBN:978-0072528305 Kardong KV, Vertebrates: Comparative Anatomy, Function, Evolution (2006) p.556", source="http://bgee.unil.ch/"}