in simplest terms gender is what is between the ears, how we think of ourselves and sex is what is between the legs, our physical anatomy.
when someone feels a disconnect between the mind and the physical anatomy and wants to alter it they are considered transgendered and they are catgorized on a scale between mild CD to severe gender dysphoria (TS). a transsexual is one who is in various stage with the true TS most likely treated with HRT, electrolysis and GRS. Most fully transition from male to female.
emmi