So this is our A order. And between the aorta and the pulmonary trunk we have another type of passageway that allows the redirecting and the rerouting of that blood, but this time from the pulmonary trunk and directly into our order. So we have these three different shunting processes that take place within the circulatory system of the fetus. One takes place between the umbilical vein and the inferior venecrava. The second one takes place between the right atrium and the left atrium. And the third one takes place between the pulmonary trunk and between our aorter.