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It has to get oxygen and get rid of CO2

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Q: Why is it unnecessary for all of the blood to enter the lungs in a fetus?
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How is the circulation of a different from the circulation of a baby?

in a fetus blood does not reach the lungs for purification. In a baby blood goes to the lungs for oxygenation.


How is the circulation of a fetus different a from the circulation of a baby?

in a fetus blood does not reach the lungs for purification. In a baby blood goes to the lungs for oxygenation.


How is the circulations of a fetus different from the circulation of a baby?

in a fetus blood does not reach the lungs for purification. In a baby blood goes to the lungs for oxygenation.


Why is it not necessary for large quantities of blood to enter the pulmonary system of a fetus?

It is not necessary for large quantities of blood to enter the pulmonary system of a fetus because the fetus receives oxygen and nutrients from the placenta, not through the lungs. The fetal lungs are collapsed and non-functional until after birth, so only a small amount of blood, needed for lung development, circulates through the fetal pulmonary system. The majority of blood is shunted away from the lungs through special fetal circulation pathways, allowing blood to bypass the lungs and flow directly to the rest of the body.


In the fetus only a small amount of blood travels from the heart to the lungs and back Why is it not necessary to send all the blood to the lungs?

a fetus doesnt require much oxygen in the lungs as it isn't in the air and isn't being breathed in. a fetus aquires oxygen through other processes


Does blood enter the blood from the lungs?

no, it doesn't, but oxygen does.


Does oxygen enter the blood stream in the lungs or in the heart?

The lungs, I the alviolies.


What organ serves as a respiratory organ for the fetus?

The lungs of the mother breath in the air. The lungs put the oxygen in the red blood cells. The blood flows through the walls of the uterus and through the umbilical cord into the blood stream of the fetus. The venus blood supply returns through a vein in the cord back into the mother and the lungs and the cycle repeats until the cord is cut.


What is the place where oxygen enter the blood?

lungs


What is the foramen ovale and what is its fate after birth?

That is very good question! You get the oxygenated blood from the placenta via umbilical vein in case of the fetus. This vein enters the liver of the fetus. The blood then goes to right atrium of the fetus. The lungs are closed in the fetus. So the blood goes to left atrium through foramen ovale to bypass the pulmonary circulation of the fetus. After the birth of the baby, baby takes the first breath. The lungs get inflated. Blood starts to flow via lungs. This closes the foramen ovale. The marking remains there on the wall between both the atria.


Why does blood have to enter the lungs?

To make the lungs work and if our lungs didn't work then we couldn't breathe.


Does blood enter the lungs via the pulmonary artery?

Yes, the blood enters the lungs via pulmunery artery