A fascinating read on organs, tissues, and muscles that evolution hasn't done away with to date. Makes me wonder if, since medical science enables, to the limits of it's ability, those afflicted by previously unsurvivable natural genetic mutations to survive and propagate, that they propagate that mutation as well, suffering people to continue to suffer from ailments that would, otherwise, be worked out by natural selection. Sounds very harsh, but it's a testament to the effects of intelligence on evolution.
https://notes.utk.edu/Bio/greenberg.nsf/0/0765bb50d404455385256f0000680854?OpenDocument&Click=
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