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Destroyer Bio says Gas exchange occurs in fetal lungs; what gives? I thought all circulation would occur via chorion and allantois. Aren't the fetal lungs collapsed and filled with surfactant?
Thoughts?
wikipedia says "The circulatory system of a human fetus works differently from that of born humans, mainly because the lungs are not in use: the fetus obtains oxygen and nutrients from the woman through the placenta and the umbilical cord.[30]"
Thoughts?
wikipedia says "The circulatory system of a human fetus works differently from that of born humans, mainly because the lungs are not in use: the fetus obtains oxygen and nutrients from the woman through the placenta and the umbilical cord.[30]"
