The practice of obstetrics, designed for the use of students and practitioners of medicine . Fig. 113.—Cross-section of UmbilicalCord at Term. X about 12 diameters,y, Remnant of the allantois; V, umbilicalcord; A, A, umbilical arteries.—{Minot.). Fig. 114.—Transverse Section throughthe Umbilical Stalk of an Embryo MM.—Am., Amnion; , medtdlarygroove; V,V., umbilical veins; , um-bilical arteries; All., allantois; coe, coelom.{His.) 76 THE UMBILICAL CORD. 77 harmful pressure. It is derived from the mesodermic layer of the abdominalstalk. The gelatin has an irregular distribution, b
The practice of obstetrics, designed for the use of students and practitioners of medicine . Fig. 113.—Cross-section of UmbilicalCord at Term. X about 12 diameters,y, Remnant of the allantois; V, umbilicalcord; A, A, umbilical arteries.—{Minot.). Fig. 114.—Transverse Section throughthe Umbilical Stalk of an Embryo MM.—Am., Amnion; , medtdlarygroove; V,V., umbilical veins; , um-bilical arteries; All., allantois; coe, coelom.{His.) 76 THE UMBILICAL CORD. 77 harmful pressure. It is derived from the mesodermic layer of the abdominalstalk. The gelatin has an irregular distribution, being thicker in some parts,where it forms the so-called false knots in the cord. This peculiar substanceconsists in great part of embryonic connective tissue, and is abundantlysupplied with branching cells-, the protoplasmic processes of which freely anas-tomose. The vessels of the-funis are originally two arteries and two two veins fuse early, leaving only one (Figs, no and 113), which comes to liebetween the arteries, so that the funic pulse can be easily felt. The vessels arecoiled from right to left, there being ten to twelve such turns. The spiral aspectthus given to the cord has been variously explained. One cause assi
Size: 1687px × 1481px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectobstetrics, bookyear1
