. Obstetrics: the science and the art. branchio-absorptive or placental connec-tion with the parent—just as happens to the urachus and allantois. Fig. 61. 411. 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 vessel shining through thechorion and lying betwixtit and 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; h h the naval string orcord laid open; d t
. Obstetrics: the science and the art. branchio-absorptive or placental connec-tion with the parent—just as happens to the urachus and allantois. Fig. 61. 411. 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 vessel shining through thechorion and lying betwixtit and 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; h h the naval 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; ef the two umbilical arteriesof the foetus ; li the umbili-cal vesicle or vitelline sac,whose pipe, conduit, or effe-rent duct runs along theumbilical cord to the navel,and passing into the bellyempties itself in the ileumg g^ which bends up to re-ceive the discharge; k I represents the omphalo-mesenteric 218 PREGNANCY. Fig. 62. 412. In very early states, the knuckle of ilium rises quite liighup in llie root of the umbilical cord—occasionally it becomes fixedthere, and the child, continuing to grow, is at length born with anirreducible exomphalos. A careless accoucheur may in cutting thenavel string, have the misfortune to cut off the top of the arc ofintestine, and thus subject the miserable neonatus to the dis-gusting inconvenience of an artificial anus, as happened in a casewithin my knowledge. I have seen the major part of the convolu-tions of the small intestines detained in an immense exomphalictumor, covered only by the cord and a lining of peritoneum to whichthey irreducibly adhered. As the cord is essentially deciduous, nohope is left to save a child thus deformed. It is non-viable. Fig. 62shows one of these cases that fell under my care a few years since, andof which I made this correct drawing. Now, as the umbilical cord is lined exter
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectobstetrics, bookyear1
