By improving your fitness level, what lifelong benefits do you gain?

Ican only answer your first question, a machine is like a human body because it's a little similar. they both almost work like the same.

False is the correct answer

Unlike  ct scans, which use x-rays,  mri scans  use powerful magnetic fields and radio frequency pulses to produce detailed pictures of organs, soft tissues, bone and other internal body structures.  differences between  normal and abnormal tissue is often clearer on an  mri  image than a  ct.you can see more with a mri scan. for example on an mri you can see internal bleeding.