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FETAL CIRCULATION: Placenta is the organ of gaseous exchange. Existence of fetal channels.

FETAL CIRCULATION: Placenta is the organ of gaseous exchange. Existence of fetal channels. Atria are linked by the foramen ovale . Pulmonary trunk and aorta linked by the ductus arteriosus . Umbilical vein takes blood to the fetus and empties into the portal sinus.

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FETAL CIRCULATION: Placenta is the organ of gaseous exchange. Existence of fetal channels.

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  1. FETAL CIRCULATION: • Placenta is the organ of gaseous exchange. • Existence of fetal channels. • Atria are linked by the foramen ovale. • Pulmonary trunk and aorta linked by the ductusarteriosus. • Umbilical vein takes blood to the fetus and empties into the portal sinus. • Major portion to IVC through ductusvenosus. • IVC flow separated by the cristadividens from SVC flow. • IVC flow through foramen ovale to left atrium flow to the aorta. • Aortic blood above the ductus goes to the brain and forequarters and rich in oxygen. • Lower aorta gives rise to umbilical arteries →placenta.

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