Now, a small portion of the blood will still leak into the right ventricle and then will pass into the pulmonary trunk. So this is the pulmonary trunk that connects to the right and the left pulmonary arteries. Now, those pulmonary arteries at the pulmonaire trunk we have yet another connection between the pulmonary trunk and our aorter. 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.