And so what the fetal circulatory system does is it conserves some of that oxygen and the nutrients inside the blood by shunting or redirecting that blood away from that liver and directly into thin fear venecava. And this takes place as a result of the presence of a special type of duct within the circulatory system of that fetus known as the ductus venosis. So the ductus venosis is a small type of blood vessel that creates a pathoge way that allows the oxygenated and nutrient filled blood to bypass the liver and go directly into the inferior venecaiva. So this is the inferior venecrava. And notice, the inferior venecaiva carries the deoxygenated blood from the organs and tissues found at the bottom of that developing fetus. And when we have this intersection taking place, we have the mixing of the oxygenated and nutrient filled blood with the deoxynated blood.