The church as specialised centres

I Cor 12:6 says there are differences of administrations but the same Lord. The church is the body of Christ on the earth. I believe in these scriptures lies the prophetic destiny of the church and the evolving process the Spirit will take church through.
Even if the church doesn't look like the body now, it will surely become one, it is only a matter of time. Not one of the words of the Lord will pass unfulfilled.
Now, one of the things to look for in the body is that the body is composed of several sections distinct from each other, yet joined to each other perfectly.
these are specialised sections of the body. The hand is different from the leg, the eyes, the ears etc I Cor 12:14-31
There is one important point to note, it's that it is God who sets the members of the church. It is not in our own capacity. John 15:1, says God is the husbandman.
So the church is becoming specialised centres dedicated to specialised work on the earth. This work is in our days and not later and the sooner we understand this the better oriented to the flow of the spirit we become.
The evidence of the unity is not external. There is a solid structure on the inside- the skeletal system nourished by a massive network of fibre tissues, nervous system, muscles, cartilages, blood system etc.
SO WHAT IS THE WORK OF THESE SPECIALISED CENTRES AND HOW DO WE RECOGNISE THEM.