The Dublin practice of midwifery / by Henry Maunsell.

  • Henry Maunsell
Date:
1856
Catalogue details

Licence: Public Domain Mark

Credit: The Dublin practice of midwifery / by Henry Maunsell. Source: Wellcome Collection.

    76/328 page 60
    into the riglit auricle, and from thence part of it goes through the foramen ovale (which closes after birth) directly into the left auricle; from thence into the left ventricle^ and so by the aorta into the general circulation. Another portion of the blood in the right am'icle passes in the ordinary course into the right A cntricle, and thence into the pul- monary artery; but as the uninflated lungs are not capable of recei^dng it, a passage, termed the ductus arteriosus (notpervious afterbirth), conveys it into the aorta, where it joins the blood which lias passed through the foramen ovale, and is dis- tributed along mth it through the body. From the iliac arteries, however, two branches, deno- minated the hypogastric, pass off upon the back of the bladder, ascend to the umbilicus, and then become the arteries of the cord : these convey a considerable portion of blood from the descending aorta back to the placenta, for the purpose of re- novation. The hypogastric arteries degenerate into cords in the breathing child. The body of the foetus is covered with a whitish sebaceous matter, called the vernix caseosa: the use of this is, probably, to protect the skin against the effects of long immersion in the liquor amnii. The average weight of the foetus at the full period is about seven pounds: it is sometimes, however, as much as twelve pounds : the average joint weight of twins is eleven pounds. In the gravid uterus
    No text description is available for this image
    No text description is available for this image
    No text description is available for this image