Which is confirm'd, for that its seen, that animals which have no lungs have but one onely concavity in the heart; and that children, who can make no use of them when they are in their mothers bellies, have an opening, by which the bloud of the vena cava runs to the left concavity of the heart, and a conduit by which it comes from the arterious vein into the great artery without passing the lungs.
Hau baieztatuko da ikusten delako birikarik ez duten animaliek bihotzean zulogune bakarra dutela, eta baita ikusten delako haurrek, euren amaren sabelean dauden artean birikak erabili ezin dituztenez, odola kaba zainetik bihotzaren ezkerreko zulogunera helarazten duen irekidura bat dutela eta baita biriketatik pasa gabe arteria zainetik arteria nagusira dakarren hodi bat ere.