Like here and in Romans 12:4-8, Paul is using the analogy of the human body and its many parts to illustrate the nature of the Church…(the human body having 206 bones, 650 muscles, 78 organs, and billions of smaller structures of cells and tissue.) And like the human body, the Church is also comprised of billions of parts, each of which (like our bodies) has its own unique purpose and significance…each part not functioning independently, but cooperating mutually together in its unity, diversity, and service together. Paul too makes a point to show that as the body of Christ, we are all one in Him…the wall of separation, prejudice, and favoritism is gone…we are united together as one body (The Church) in Him.