Have you considered the amazing function of the baby’s heart in the womb?
How does a baby breathe when immersed in a sack of water? Why doesn’t blood circulate through a baby’s lungs while the baby is inside of the mother? The blood does not need to circulate to the lungs because the baby receives its oxygen from the mom’s placenta via the umbilical cord. Yet the heart is a vital organ that must function from the beginning. So what changes in the baby’s heart at birth?
The unborn baby’s lungs are collapsed; therefore, the right side of the heart does not need to send blood to the lungs. There are two short-cuts in the unborn baby’s heart that enable the blood to bypass the lungs. One is called the “foramen ovale” and the other is “ductus arterioseus”. The foramen ovale is a hole between the right and left side of the heart. Blood flows from the right side directly through the wall into the left side. An unborn baby has a hole in its heart. At birth, as the baby makes its first cry, oxygen sweeps in, the lungs are inflated and the flap slams shut, closing the hole. Blood now starts circulating into the lungs to get oxygen.
The other lung bypass is the ductus arterioseus. This blood vessel routes the blood directly into the aorta. When the baby is born, the body makes chemicals that cause this blood vessel to instantly close. The blood then begins moving through the lungs to absorb oxygen.
How do evolutionists explain this complex and perfectly designed set of engineering marvels? What if no flap developed? Holes in the heart are not a good thing. What if the extra bypass blood vessel did not close down? Instant death! We can breathe a sigh of relief that God designed this marvelous heart to function wonderfully before birth and after birth without a moment’s delay.
(Source: Inspired Evidence Von Vett & Malone – Heather M. Brinson ”Heart Constantly Beating Death” Answers Magazine Dec. 2009)