A mid bottom bracket is slightly adjustable and sits in an oval shell.
a bottom bracket is the thing that goes through the frame and connects the cranks (pedals)
Spanish, english, isis etc are differant threads that connect the cranks to the bottom bracket.
A campy sec integrated headset is a campagnolo headset that is sectionally integrated into the frame, there are some removeable peices.
A frame ids the main part of the bike, that everything connects to.
and a fork is what is attached from the frame to the front wheel.
