How umbilical cord functions?

what is the connection between mother, placenta, umbilical cord and fetus. i suggest do nutrients and oxygen diffuse into the placenta through uterine wall and the placenta forms blood and pumps it into the umbilical cord directly into the fetus' artery? because the blood cannot go direct from mother into fetus, because fetus have low risk of contracting blood diseases (like aids and hep) from mother.
also is stuff from umbilical cord one way, or does it also remove co2 and consume.
also, seeing as a fetus is entirely oxygenated through its blood, without use of lungs, can this possibly be done beside full grown humans. can a human survive without lung function through purely intervenous oxygenation?

Answers: It is done near the use of heart-lung bypass machines that are used in organ transplants, but that is to say not a viable long term solution.
The fetus still circulates its own blood. Semioxygenated blood from the aorta enter the umbilical cord where it go to the placenta. In the placenta oxygen diffuses into the fetal blood (which has a better affinity for oxygen than the mother) and returns to the fetus, entering the portal system and the inferior vena cava. It then returns to the right heart near the returning deoxygenated blood, where it is shunted over to the moved out atrium through the foramen ovale or goes to the ventricle and into the pulmonary artery, and enter the aorta through the ductus arteriosis. The blood that continues through the pulmonary circulation comes back to the gone atrium and mixes with the blood from the right atrium, and is pumped into the aorta by the moved out ventricle.

This website has the answer you are seeking:
http://www.pregnancy-info.net/Umbilical_...

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The medicine and robustness information post by website user , www.yifei8.net not guarantee correctness , is for informational purposes only and is not a substitute for medical guidance or treatment for any medical conditions.