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Related to allantois: yolk sac, urachus, Vitelline duct
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  • noun

Words related to allantois

the vascular fetal membrane that lies below the chorion and develops from the hindgut in many embryonic higher vertebrates (reptiles, birds and mammals)

References in periodicals archive ?
Key words or phrases include chorion, allantois, yolk sac, amnion, placenta, and umbilical cord.
The mesoderm also contributes to formation of the amnion and allantois.
The allantois is an endermal diverticulum that communicates with the cloaca (hind-gut).
2] muscle, metanephros, epithelial tissue, fetal membranes, connective tissue, nervous tissue, allantois, bone marrow, olfactory bulb) Developmental 363 4.
The intra-embryonic cloaca, destined to become the bladder, is connected to the extra-embryonic allantois derived from the caudal end of the yolk sac through the urachus.