And by expanding the alveoli, that decreases the resistance and decreases the pressure inside the alveoli. So as soon as the first breath is taken, what happens is we have a decrease in resistance and so a decrease in pressure which takes place within our lungs and that eventually also takes place within our liver. So the liver begins to function following birth. And so the resistance as a result of that decreases. Now, because we decrease the resistance and the pressure in the lungs, what happens is now the blood from the right atrium is more likely to move into the right ventricle and into the pulmonary trunk and then into the lungs, where the pressure is now is now low. So air fills the alveoli of the lungs, expanding them.