Umbilical cord Umbilical cord In placental mammals, the umbilical cord (also called the navel string, birth cord or funiculus umbilicalis) is a conduit between the developing embryo or fetus and the placenta. During prenatal development, the umbilical cord is physiologically and genetically part of the fetus and (in humans) normally contains two arteries (the umbilical arteries) and one vein (the umbilical vein), buried within Wharton's jelly. The umbilical vein supplies the fetus with oxygenated, nutrient-rich blood from the placenta. Conversely, the fetal heart pumps low oxygen containing blood, nutrient-depleted blood through the umbilical arteries back to the placenta. The umbilical cord develops
Social uterus Social uterus Social uterus is a developmental concept in family therapy for psychosomatic disorders. Social uterus as an integrative model of family development was invented by Vladislav Chvála and Ludmila Trapková in 1990's. The metaphor of a social uterus was formed by comparing the biological function of the uterus and the maturation of the foetus inside it from conception to childbirth with the changes in the family from the birth of the child up to its separation around the age of 18. The metaphor translates facts well known from the biology of reproduction to the social level. In the "social