All of the following are true about fetal circulation EXCEPT?
Pulmonary vascular resistance is low
Umbilical aeries carry deoxygenated blood
Lungs are collapsed and filled with fluid
source of oxygen in fetal circulation is placenta
Components of Fetal circulation: - placenta --> source of oxygen As placenta provides gas exchange for fetus, lungs are collapsed & filled with fluid exhibiting high pulmonary vascular resistance Thus, very little blood flows to lungs - Ductus venosus --> provide low resistance bypass for umbilical venous blood to reach Inferior Vena Cava - Ductus aeriosus --> Allow right ventricular blood to reach descending aoa, since lungs are non-functioning - Foramen ovale --> Enables oxygenated blood to reach left atrium & ventricles for distribution to hea & brain. - Umbilical vein--> carry oxygenated blood from placenta towards fetus - umbilical aeries --> carry deoxygenated blood from fetus to placenta Fetal circulation:
Fetal circulation