And so it's the ductus venosis that allows the blood to quickly and efficiently bypass the liver and enter thin fear of venecrava. Eventually, then, fear of venocava connects with umbilical vein and connects with the superior venecva. The partially oxygenated and deoxynated blood mixes and that goes into the right atrium of the heart. Now, within the right atrium of the heart, we have another type of Shunk that exists. This is known as the foray Mino valley. Now, if we zoom in on the wall separating the right atrium and the left atrium, this is what we get.