Comparative anatomy is supposed to tell us which creatures are closely related so that we can draw those familiar evolutionary family trees. That anatomical similarities may be misleading is proved by the various configurations of the mammalian aortic arch -- certainly one of the major body structures. Five prin-cipal configurations of mammalian aortic arches are sketched in the accompanying figure. The species possessing these various configurations make kindling of the usual evolutionary family trees.
Horses, pigs, deer;
Marsupials, rats, dogs, apes, monkeys;
The platypus, sea cows, some bats, humans;
African elephants, walruses.
(Davidheiser, Bolton; "The Aortic Arch," Creation Research Society Quarterly, 20:15, 1983.)
Comment. On this basis alone, humans are more closely related to sea-cows than the apes. Why aren't such discrepancies highlighted in the mainstream scientific literature?
Mammalian aortic arch . The key is as follows: RC: right carotid; LC: left carotid; RS: right subclavian; LS: left subclavian; A: aorta. The kinds of animal which have various arrangements are mentioned in the text.