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During gestation the ductus venosus shunts most of the blood from the umbilical vein directly into the inferior vena cava. Shortly after birth the ductus venosus closes to allow normal circulation. It usually closes completely within the first week after birth, but can take longer in pre-term infants. After it is closes a small remnant remains and is called the ligamentum venosum.
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6 structures needed for fetal circulation?
Umbilical Arteries Placenta Umbilical Vein Ductus Venosus Foramen Ovale Ductus Arteriosus
What is the most fetal blood in the umbilical vein enters the inferior vena cava through?
The most fetal blood in the umbilical vein enters the inferior vena cava through the ductus venosus.
The shunt that allows most fetal blood to bypass the liver?
The Ductus Venosus
Why is the ductus venosus no longer needed when the pig born?
The ductus venosus is a fetal blood vessel that allows oxygenated blood from the placenta to bypass the liver and flow directly into the inferior vena cava, facilitating efficient circulation. Once a pig is born, it begins to breathe air, and its lungs expand, significantly increasing blood flow to them. This shift in circulation makes the ductus venosus unnecessary, as oxygenated blood can now be obtained directly from the lungs rather than the placenta. Consequently, the ductus venosus closes and eventually becomes a fibrous remnant in the adult pig.
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.
In fetal circulation the ductus arteriosus?
In fetal circulation, the ductus arteriosus is a connective vessel between the pulmonary artery and aorta. It works as to bypass the lungs, which are collapsed in the womb. After birth, the ductus arteriosus normally closes.
What is the branch of the umbilical vein in the fetus that connects with the inferior vena cava bypassing the liver?
another fetal structure ?
Fetal blood that passes through the ductus venosus is relatively High in oxygen and nutrients?
The ductus venosus shunts most of the left umbilical vein blood flow directly to the inferior vena cava. This allows relatively highly oxygenated blood from the placenta to bypass the liver and get to the fetal brain.
What is the function of the ductus venosus?
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…
What structure is used to connect the aorta and the pulmonary artery in fetal circulation?
Ductus arteriosus
What are the two fetal circulation bypasses found in the fetal pig?
Because the fetal lungs are inactive, the pulmonary circuit is bypassed. Half of the blood that enters the right atrium flows directly into the left atrium through the foramen ovale. The remainder flows from the right atrium to the right ventricle, then into the pulmonary trunk. The second bypass, the ductus arteriosus, transports the blood directly from the pulmonary artery into the aorta so it can be sent into systemic circulation.
Does the presence of the ductus arteriosus increase or decrease the efficiency of the fetal circulation?
Increase
