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vitellarium

   Also found in: Medical, Encyclopedia 0.01 sec.
vi·tel·lar·i·um  (vtl-âr-m, vt-)
n. pl. vi·tel·lar·i·ums or vi·tel·lar·i·a (--)
A group of glands that secrete yolk around the egg in those invertebrates, such as worms, whose eggs do not contain yolk.

[New Latin, from Latin vitellus, egg yolk; see vitellus.]


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To study the chick embryo, Fabrici, 1942b, 141-48, begins with basically seven structures, though the uterus signified three of them: the uterus, the egg, the vitellarium (group of yolks) or raceme (ovary, group of eggs), the pediolus (stalk to which yolks are attached), the peduncle (attaching yolk to the stalk), the infundibilum (the passage between the first and second uterus), and the podex (where the second uterus terminates).
Generally only the terminal follicle within an ovariole is vitellogenic, there being a distinct demarcation between the previtellarium and the vitellarium of the ovariole.
 
 
 
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