In a fetus solely small amount of blood travels from the heart to the lungs and subsidise?
Answer:
The fetus take in outstandingly oxygenated blood from mom via the umbilical vein. Since within is no, or very little, oxygen within the amniotic fluid, there is no oxygen extract. The blood is shunted away from the lungs via the ductus arterious. This closes shortly after birth when the oxygen tautness of the returning blood (from the lungs) rises.
Remember, the most efficient is usually favored, so since it doesn't give support to to pump blood to the lungs, we don't.
the fetus is not breathing, therefore not using lungs, and so what's the difference if the lungs get any blood? the point lungs get blood is to pinch out carbon dioxide from the blood and put oxygen into it. the fetus gets blood near all the nutrients, oxygen, etc. from the mother.