Because the lungs are filled with fluid during fetal life, which of the following statements is true regarding respiratory exchange?
A. Respiratory exchanges are made through the ductus arteriosus.
B. Respiratory exchanges are not necessary.
C. Respiratory exchanges are made through the placenta.
D. Because the lungs develop later in gestation, fetuses do not need a mechanism for respiratory exchange.
Answer:C
Because the lungs are filled with fluid during fetal life, which of the following statements is true regarding respiratory exchange?
A. Respiratory exchanges are made through the ductus arteriosus. B. Respiratory exchanges are not necessary. C. Respiratory exchanges are made through the placenta. D. Because the lungs develop later in gestation, fetuses do not need a mechanism for respiratory exchange.