God has made Christ the supreme head of the church.
And hath put all things under his feet, and gave him to be the head over all things to the church, which is his body, the fulness of him that filleth all in all (Ephesians 1:22-23).
The church represents the body of Christ. When you look at human anatomy, you find the head attached to the body and the body attached to the feet. The head (Jesus) is attached to the body (the church) which is attached to the feet. But what is the body of Christ? Just as the human body is comprised of many parts working together as one, so it is with the body of Christ. In fact, the members are baptized by one Spirit to form one body, nourished by the same Spirit so there is no disunion in the body. You are the body of Christ and member of the body, individually.