In the biblical text, there are multiple times where the people of God in the New Testament are referred to as the Body of Christ. One such example can be seen in 1 Corinthians 12:12-13, 19-20, “For just as the body is one and has many members, and all the members of the body, though many, are one body, so it is with Christ. For in one Spirit we were all baptized into one body—Jews or Greeks, slaves or free—and all were made to drink of one Spirit. For the body does not consist of one member but of many… if all were a single member, where would the body be? As it is, there are many parts, yet one body.”
This passage places an emphasis on oneness in Christ and the Spirit, there is also a clear argument that in one body there are many members. These many members have distinctions in what they bring to the body, and together with distinction and diversity the body functions as it is intended to.