Umbilical vein vs. artery

[firstcitizen]

Which carries oxygenated RBC's to fetal tissues?

On Achiever, the answer is umbilical vein.

On Kaplan, the answer is umbilical artery.

Can someone please clarify the answer for me?

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[Lonely Sol]

Which carries oxygenated RBC's to fetal tissues?

On Achiever, the answer is umbilical vein.

On Kaplan, the answer is umbilical artery.

Can someone please clarify the answer for me?

Umbilical vein (carries blood from placenta where it just converted to oxygenated blood to the fetus) and pulmonary vein are the only veins that carry oxygenated blood

 

[passDAThope]

Yeah the Barron book that I have says that the umbilical artery carries oxygenated blood. I figured that was true because doesn't arteries carry blood away from the heart? So once the oxygenated blood from the pulmonary vein enter the heart it has to circulate to the rest of the body which should be by arteries since blood going into circulation to the body is carried away from the heart.

 

[cuttiedentist]

umbilical vein take the oxygenated blood from placenta to fetal heart the the fetus take the oxygenated blood from its heart to its tissue not by way of umbilical artery but by its own circulatory system. umbilical artery take the deoxygenated blood back to the placenta for exchange.
i think that the way it it works
correct me if im wrong

 

[sacjumpman]

umbilical vein take the oxygenated blood from placenta to fetal heart the the fetus take the oxygenated blood from its heart to its tissue not by way of umbilical artery but by its own circulatory system. umbilical artery take the deoxygenated blood back to the placenta for exchange.
i think that the way it it works
correct me if im wrong

From Campbell:

" Blood from the embryo travels to the placenta through the arteries of the umbilical cord and returns via the umbilical vein, passing through the liver of the embryo." 6th ed. pg 990

It says nothing about passing through the heart of the embryo anywhere in this chapter...

I also looked in my upper division Physiology book and couldn't find anything to specifically answers what happens to the blood when it enters the embryo.

But the part about umbilical vein = oxygenated blood back to fetus
and umbilical artery = deoxygenated blood away from fetus is helpful.

 

[oldbearprofessor]

Placentally oxygenated blood passes via the umbilical vein into the fetus. Part of this blood bypasses the liver via the ductus venosus and goes to the inferior vena cava and then the heart. The rest passes through the liver before going to the IVC and the heart. After the now partially oxygenated blood enters the right heart, it is primarily shunted via the ductus arteriosus (and intracardiac shunts) away from the lungs and towards the aorta directly to the tissues and ultimately to the umbilical artery and the fetus for reoxygenation.

At birth (over the first days of life in healthy full-term babies), both the ductus venosus and the ductus arteriosus close allowing for the creation of the normal circulatory pattern of venous blood to the liver and the lungs.

Neonatologists cannulate both the umbilical vein and use it as a central line and the umbilical artery (there are normally 2 arteries and one vein) in sick babies and use them for monitoring.

In other words, both Acheiver and Kaplan are oversimplified explanations, although for a one sentence answer, Acheiver is closer to the truth.

OBP and the SDN neonatology service are here for you!

 

[sacjumpman]

Placentally oxygenated blood passes via the umbilical vein into the fetus. Part of this blood bypasses the liver via the ductus venosus and goes to the inferior vena cava and then the heart. The rest passes through the liver before going to the IVC and the heart. After the now partially oxygenated blood enters the right heart, it is primarily shunted via the ductus arteriosus (and intracardiac shunts) away from the lungs and towards the aorta directly to the tissues and ultimately to the umbilical artery and the fetus for reoxygenation.

At birth (over the first days of life in healthy full-term babies), both the ductus venosus and the ductus arteriosus close allowing for the creation of the normal circulatory pattern of venous blood to the liver and the lungs.

Neonatologists cannulate both the umbilical vein and use it as a central line and the umbilical artery (there are normally 2 arteries and one vein) in sick babies and use them for monitoring.

In other words, both Acheiver and Kaplan are oversimplified explanations, although for a one sentence answer, Acheiver is closer to the truth.

OBP and the SDN neonatology service are here for you!

You are a badass. Thanks 🙂