Question

in a neonate the blood flow through ductus arteriosus and foramen ovale ceases;the adult pattern of blood flow through the heart,aorta and pulmonary artery beginsThis switch over is initiated by gaseous hormone (1)CO2 (2)02 (3)CO (4)NO

Answer 1

Oxygen and nutrients from the mother's blood are transferred across the placenta to the fetus. The enriched blood flows through the umbilical cord to the liver and splits into three branches. The blood then reaches the inferior vena cava, a major vein connected to the heart.