Regarding respiratory changes at birth, changes in blood flow that occur lead to the closure of the ________, the embryonic interatrial connection.

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The foramen ovale is an opening between the right and left atria of the fetal heart that allows blood to bypass the lungs. During fetal development, oxygenated blood from the placenta is shunted through the foramen ovale directly into the left atrium and then pumped out to the body. However, at birth, as the lungs begin to function, the increased oxygen levels cause a decrease in pulmonary vascular resistance and an increase in left atrial pressure. This leads to the closure of the foramen ovale, which eventually becomes sealed off by connective tissue, forming the fossa ovalis.

Regarding Respiratory Changes at Birth, Changes in Blood Flow That