. Text-book of anatomy and physiology for nurses. --X. Fig. 142.—The Fetal Circulation (Morris). 192 ANATOMY AND PHYSIOLOGY FOR NURSES. The placenta.—The placenta is formed in a portion of the linmgmembrane of the uterus, by an intricate arrangement of the uterinevessels of the mother with the umbilical vessels of the fetus. It ishere that the umbilical arteries coming from the fetus, end; andthe umbilical vein going to the fetus, arises. Here also the inter-change of gases and of waste and nutritive matter between fetal andmaternal blood, is carried on. The umbilical cord connects the placent
. Text-book of anatomy and physiology for nurses. --X. Fig. 142.—The Fetal Circulation (Morris). 192 ANATOMY AND PHYSIOLOGY FOR NURSES. The placenta.—The placenta is formed in a portion of the linmgmembrane of the uterus, by an intricate arrangement of the uterinevessels of the mother with the umbilical vessels of the fetus. It ishere that the umbilical arteries coming from the fetus, end; andthe umbilical vein going to the fetus, arises. Here also the inter-change of gases and of waste and nutritive matter between fetal andmaternal blood, is carried on. The umbilical cord connects the placenta and the fetus. Itcomprises the two arteries and the one vein, protected by a gelatinoussubstance or Whartons jelly, in which they are embedded. PHYSIOLOGY OF THE BLOOD. We have learned that the nutritious portions of the food are,after digestion, poured into the blood and circulated throughoutthe body; also that cell action results in waste which is returned tothe blood. Again, that tissue changes are chemical in their natureand chemical action
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