'My Flesh' in the Bible

For I know that there dwelleth not in me (that is, in my flesh) any good thing: for to will is present with me; but how to perform that which is good I find not.

I give thanks to God through Jesus Christ our Lord. Well then, I myself with my mind am servant to the law of God; but in my flesh to the law of sin.

if by any means I might provoke to jealousy my flesh, and save some of them.