Obstetrics : the science and the art . has completely established itsbranchio-absorptive connection with the parent—-just as happens tothe urachus and allantois. Omphalo-Mesenteric Vessels and Cord.—In perfect ova,aborted at the period of two months, or a little later, the Studentwill readily distinguish the umbilical vesicle shining through the chorion and lying betwixt itand the delicate amnioticmembrane. I add here afigure (61), that may serveto explain its a be a portion of the ab-domen of the embryo, andc c the navel or umbilicalring; b b the navel string orcord laid open;
Obstetrics : the science and the art . has completely established itsbranchio-absorptive connection with the parent—-just as happens tothe urachus and allantois. Omphalo-Mesenteric Vessels and Cord.—In perfect ova,aborted at the period of two months, or a little later, the Studentwill readily distinguish the umbilical vesicle shining through the chorion and lying betwixt itand the delicate amnioticmembrane. I add here afigure (61), that may serveto explain its a be a portion of the ab-domen of the embryo, andc c the navel or umbilicalring; b b the navel string orcord laid open; d the um-bilical vein bringing backthe blood from the placenta,and passing into the belly atthe ring to go to the liver; cf the two umbilical arteriesof the foetus; h the umbilicalvesicle or vitelline sac, whosepipe, conduit, or efterentduct runs along the umbili-cal cord to the navel, andpassing into the belly emp-ties itself in the ileum g g,which bends up to receivethe discbarge; fc / represents the omphalomesenteric PREGNANCY. 217 In very early states, the knuckle of ilium rises quite high up inthe root of the umbilical cord—occasionally it becomes fixed there,and the child, continuing to grow, is at length born with an iricible exomphalos. A careless accoucheur may, in cutting the navelstring, have the misfortune to cut off the top of the arc of intestine,and thus subject the miserable neonatus to the disgusting inconveni-ence of an artificial anus, as happened in a case within my have seen the major part of the convolutions of the small intestinesdetained in an immense exomphalic tumor, covered only by the cordand a lining of peritoneum to which they irreducibly adhered. Asthe cord is essentially deciduous, no hope is left to save a child thusdeformed. It is non-viable. Fig. 62 shows one of these cases thatfell under my care a few years since. Xow, as the umbilical cord is lined externally with amnion, it isclear that the umbilical vesiclelies
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Keywords: ., boo, bookcentury1800, booksubjectmidwifery, booksubjectobstetrics
