MacBook, display, bluetooth and antennas

Hello. How are you? I need to replace (or I want to replace) Bluetooth card an wi-fi card in my MacBook Pro 13" Unibody (2009). I removed the airport-wi-fi card without problems (it's in the clutch cover, in the joint beetwen display and computer body) but I have many questions about bluetooth cards and antennas. I think the bluetooth card is below the glass of the display but, in your guide, many things appear below the glass. What is the bluetooth card? Can I remove it? And where are the antennas?

Thank you for your interest. I really need an answer. Thanks again.