单词	oviduct
释义	oviduct /ˈəʊvɪdʌkt / noun Anatomy & Zoology The tube through which an ovum or egg passes from an ovary.In females, in the absence of the testes, the Müllerian ducts develop into the oviducts, which transport eggs from the ovaries to the uterus, while the Wolffian ducts degenerate.... Their lungs, liver, spleen, kidneys, ovaries and oviducts were all infected. The paired eggs suggest that these dinosaurs retained two functioning ovaries and oviducts, each producing a single egg at a time. Derivatives oviducal /əʊvɪˈdjuːk(ə)l/ adjective ... A special gland in the female, unique to elasmobranchs and known as the oviducal, nidamental, or shell gland, produces the egg case. In Afrixalus, the leaf-folding frog, mating pairs construct an over-water leaf nest by folding leaves together with their legs, and gluing them together with oviducal secretions. oviductal /əʊvɪˈdʌkt(ə)l/ adjective ... The researchers are focusing on differences in gene expression within cells in a special site inside the hen's reproductive tract, called the oviductal sperm-storage tubules (SSTs). Several studies have shown that mammalian embryos, exposed in vivo to hyperosmotic oviductal fluids, grow better in vitro in hyperosmotic media when provided organic osmolytes. Thus, it is puzzling that Great Tits had about twice as much oviductal sperm.
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