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What structure serves as the lungs for a fetus?
The structure that allows blood to bypass a fetus inmmature liver is called ductus venosus.
What is the foremen ovale and the ductus venosus?
The foramen ovale is a hole in the heart that allows blood to bypass the lungs in a developing fetus. The ductus venosus is a blood vessel that connects the umbilical vein to the inferior vena cava, allowing oxygen-rich blood from the placenta to bypass the liver in a fetus.
How does the fetus obtain food and oxygen?
The mother's blood supply enters the foetus via the umbillical cord and allows oxygen to diffuse from the mother's blood into the foetus.
What structure diffuses nutrients from the mother's blood into the embryo's blood?
The placenta is the structure that diffuses nutrients from the mother's blood into the embryo's blood. It allows for the exchange of oxygen, nutrients, and waste products between the mother and the fetus during pregnancy.
What connects the pulmonary trunk in the aorta in the developing fetus?
A vessel called the ductus arteriosus (aka ductus Botalli) connects the pulmonary artery to the aorta in a developing fetus. Along with the foramen ovale, the hole connecting the fetal atria, this opening allows venous blood to bypass the non-functional lungs of the fetus and be pumped back into the arteries. Until birth, the oxygenation of fetal blood is through the umbilical cord.
What is the structure that connects the circulation of the fetus and the mother but blocks the passage of blood cells?
The placenta
How is the circulation of a different from the circulation of a baby?
The fetus does not use its lungs to bring oxygen to the blood. (apex)
This structure in the fetus carries oxygen-rich blood from the mother to the baby?
Umbilicus or umbilical cord
What is function of ductus venosus in the fetus?
In the fetus, the ductus venosus shunts a significant majority (80%) of the blood flow of the umbilical vein directly to the inferior vena cava. Thus, it allows oxygenated blood from the placenta to bypass the liver. In conjunction with the other fetal shunts, the foramen ovale and ductus arteriosus, it plays a critical role in preferentially shunting oxygenated blood to the fetal brain.Source(s):http://en.wikipedia.org/wiki/Ductus_veno…
Where does the foramen ovale allow blood flow to and from?
That is a 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.
How does the ductus arteriosus improve the efficiency of fetal circulation?
The ductus arteriosus is a blood vessel connecting the pulmonary artery to the proximal descending aorta. Its function is to allow the blood from the right ventricle to bypass the fluid-filled non-functioning lungs of the developing fetus.
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.
