Dear @jwamshop:
Vocal cords in the larynx are innervated by the right and left laryngeal nerves. These nerves branch off of their respective vagus cranial nerves. On the left side, the vagus nerve travels from the skull, down the neck, toward the heart, and then past it. The recurrent laryngeal nerve branches off from the vagus just below the aorta. Looping under the aorta, the RLN then travels upward (or recurs) to serve several organs as it travels up to the larynx. Evolutionists see poor design in the fact that the left nerve does not branch off closer to the larynx. (It should be noted that even though the left RLN is longer than the right nerve, signals to each nerve are adjusted so that the vocal cords are stimulated simultaneously so normal speech is produced.)
This is NOT poor design:
Investigations at Johns Hopkins Medical School found that during development, “the left vagus nerve and its recurrent laryngeal branch form a sling supporting the distal (or ductus arteriosus component) of the left sixth aortic arch.” Remarkably, these researchers found in their study that:
The media [composition of the blood vessel wall] of the ductus arteriosus beneath the supporting nerves is thinner and has less elastic fiber formation than the elastic lamellar media of the adjacent aortic arches. The study shows that the vagus and recurrent laryngeal nerves are in a position to provide mechanical support to the ductus arteriosus during its development and that the morphology [or composition] of the media of the supported ductus arteriosus differs from that of the adjacent unsupported aortic arches. It is suggested that this local mechanical support may be the reason that the normal ductus arteriosus differentiates as a muscular artery and is therefore able to obliterate its lumen in postnatal life. Without such support the ductal media could develop the abundant elastic fibers characteristic of the normal unsupported aorta and pulmonary trunk and become an abnormal, persistently patent [or open] ductus arteriosus [not a good situation].
Developmental research shows how the RLN should be seen as a wise mechanism, designed to provide the right supporting conditions during a baby’s development for the ductus arteriosus to form correctly. There are multiple purposes for this nerve beyond activating the left vocal cord. Its length, location, and function all point to ingenious—not poor—design. The assertion that its position in our body is due to a remote fish ancestry is yet another colossal evolutionary blunder.
Sadly, this claim is much like the other arguments against an all-knowing Creator which have been proven false by science; such as so-called vestigial organs (supposedly useless organs) like the tonsils, appendix, and wisdom teeth, which all have function and purpose.
Blessings. Steven