'Body' in the Bible

My confident hope is that I will in no way be ashamed but that with complete boldness, even now as always, Christ will be exalted in my body, whether I live or die.

Now if I am to go on living in the body, this will mean productive work for me, yet I don't know which I prefer:

but it is more vital for your sake that I remain in the body.

who will transform these humble bodies of ours into the likeness of his glorious body by means of that power by which he is able to subject all things to himself.