How a body part depends on its__, and vice versa.
functions; structure
performs; aesthetics
distills; homeostasis
moves; cavities

i can't answer your question in very sad situation.

but if your situation is very bad, then you can find happiness by thinking about your past that has full of happiness.

or you should do meditation for some time to get rid off from that bad situation.

there are men and women, some choose to be both or change their gender. often times those people go by "other". those who change their gender are known as "transgender"