2007-10-23 14:51:48 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Medicine
There are two fetal bypasses that should not be present shortly after birth. First is a hole between the atrial septa called the Foramen Ovale. Next is a small blood vessel between the aorta and the pulmonary artery called the ductus arterosis. This becomes the ligamentum arteriosum in the first 2 months of life.
2007-10-23 15:45:46 · answer #1 · answered by mr.answerman 6 · 2⤊ 0⤋
in fetal circulation, there is a connection between the right and left atria known as the foramen ovale. this 'hole' will close soon after birth when the baby breathes on its own. another unique feature of fetal circulation is the ductus arteriosus which connects the aorta to the pulmonary circulation. This blood vessel also closes after birth due to increased pulmonary pressure once the baby breathes
2007-10-23 17:04:11 · answer #2 · answered by fulltank 2 · 1⤊ 0⤋
The hole between the two chambers (patent ductus arteriosis) and the resultant bypassing of flow to the non-functioning lungs.
2007-10-23 15:02:00 · answer #3 · answered by Rich Z 7 · 0⤊ 1⤋