After bih which of the following changes occur in the fetus?: (A) The foramen ovale closes allowing the entire blood volume to circulate into the pulmonary vein, (B) Lung fluid is forced out of the fetal alveoli with the first few breaths, (C) The ductus aeriosus opens, (D) The umbilical vein and aery remain functional for several weeks
Answer is B. - The foramen ovale closes allowing the entire blood volume to circulate into the pulmonary aery - The foramen ovale, the ductus aeriosus and the umbilical veins and aeries close within a few hours of bih. - Lung fluid is forced out of the fetal alveoli with the first few breaths