...The umbilical cord is broken at birth and the navel closes within a few days, but the scar remains throughout life... 
Ray D. Burkett 「Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia)」
...The umbilical scar, a sexually dimorphic character in Heterodon platyrhinos...
Ray D. Burkett 「Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia)」
...Complicated cases are common, and in all alike the umbilical veins usuallyremain open and can be explored by a probe passed at first upward and thenforward toward the liver...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...Let us also note that the lower poleexpands into the umbilical excrescence, which is less easy ofperforation than those parts protected by the skin alone...
J. H. Fabre Bernard Miall 「Social Life in the Insect World」
...However, the larger part of theembryonic vesicle of the mammal is not directly used for building up the laterbody, but for the construction of the temporary umbilical vesicle...
Ernst Haeckel 「The Evolution of Man」
...In the same way, the yelk-sac or the umbilical vesicle is not a foreignexternalappendage of the embryo, but an outlying part of its primitive gut...
Ernst Haeckel 「The Evolution of Man」
...In front ofthe allantois the yelk-sac or umbilical vesicle (ds), the remainder ofthe original embryonic vesicle, starts from the open belly of the embryo (Fig...
Ernst Haeckel 「The Evolution of Man」
...The umbilical cord develops in this case from what is called the“ventral pedicle...
Ernst Haeckel 「The Evolution of Man」
...) The embryo (a month old) hangs in the middle of theamniotic cavity by the ventral pedicle or umbilical cord, which connects itwith the placenta (above)...
Ernst Haeckel 「The Evolution of Man」
...On the inner surface of thelatter (to the left) is the placenta, which is connected by the umbilical cordwith the child’s navel...
Ernst Haeckel 「The Evolution of Man」
...These vessels naturally atrophy with the degeneration of the umbilical vesicle,and the vitelline circulation is replaced by a second, that of the allantois...
Ernst Haeckel 「The Evolution of Man」
...The infant, whose skin appeared to have a reddish cast, was lying in a piece of soft bark on the ground, the umbilical cord depending about three inches from the navel...
David Collins 「An Account of the English Colony in New South Wales, Vol. 1」
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