Originally Posted by DeltaBlack22
This is a very old crutch used by evolution supporters and is more outdated some of the scientific dating methods you spoke of earlier...
The Truth About "Gill Slits":
In the human embryo at one month, there are wrinkles (flexion folds) in the skin where the "throat pouches" grow out. Once in a while, one of these pouches will break through, and a child will be born with a small hole in the neck. That's when we find out for sure that these structures are not gill slits. If the opening were really part of a gill, if it really were a "throwback to the fish stage," then there would be blood vessels all around it, as if it were going to absorb oxygen from water as a gill does. But there is no such structure. We simply don't have the DNA instructions for forming gills.
The throat (or pharyngeal) grooves and pouches, falsely called "gill slit," are not mistakes in human development. They develop into absolutely essential parts of human anatomy - the lower jaw, tongue, thymus gland, the parathyroid, etc. The middle ear canals come from the second pouches, and the parathyroid and thymus glands come from the third and fourth.
Without a thymus, we would lose half our immune systems. Without the parathyroids, we would be unable to regulate calcium balance and could not even survive. Another pouch, thought to be vestigial by evolutionists until just recently, becomes a gland that assists in calcium balance. Far from being useless evolutionary vestiges, then, these so-called "gill slits" are quite essential for distinctively human development.
I did not mention gill slits in an attempt to explain evolution, someone else made mention of 'apes with gills' so I thought I would pass on this information. Gill slits are interesting because they show how similar precursor features develop differently in different organisms.