Which of the following is crucial for proper development of a baby's lungs?
A - The yolk sac
B - Amniotic fluid
C - The amnion
D - The chorion
E - The allantois
Answer: B - Amniotic fluid
AMNIOTIC FLUID is found within the amnion (surrounds the developing embryo) serves as a liquid cushion and is necessary for ordinary development of lungs and limbs.