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.
<span>D. can incorporate new scientific discoveries. should be the answer. Hope I helped!</span>
The answer is B. an organ.
Brainliest answer would be greatly appreciated.
This is because you have to let your food digest a bit before continuing your work out to prevent cramps and this like that.
