The allantoic duct (All. D.) is connected by a narrow cord of cells to the caudal end of the umbilical vesicle. The lumen in the duct ends blindly and does not connect with the umbilical vesicle cavity. Section 378.
Fig. 30. Heuser et al., 1945.
Keywords: allantoic duct, caudal end of umbilical vesicle, umbilical vesicle, umbilical vesicle cavity
Source: The Virtual Human Embryo.