The ductus arteriosus allows fetal blood to move from the pulmonary trunk into the aorta. The ductus venosus on the other hand is a fetal vessel that transports blood from the umbilical vein to the inferior venacava. Ductus arteriosus is a blood vessel connecting the main pulmonary artery to the proximal descending aorta. It allows most of the blood from the right ventricle to bypass the fetus's fluid-filled non-functioning lungs.
C. Decreased death rate is the answer
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Answer:
The Movement is called Migration.
Explanation:
Migration is an important component of Population growth. Migration is the movement of individual organisms into, or out of, a population.Migration affects population growth rate. Migration can be of two types- Immigration and Emigration. Immigration can be described as the movement of individual into a population from other areas. This increases the size of a population and helps in growth. Emigration can be described as the movement of individual out of population.
