The Diaphragm in Humans

How the muscles and humans are different to, say, some other animals. How they have become in ane adult form in the human can be done through a number of ways. One one way is the muscles have migrated from where they once maybe were first - but not even developed in the first instance. So if you look at te diaphragm in humans, what animal has the diaphragms in its neck? I don't know so he made them up. N i didnt.