Albert Barnes on 1 Corinthians 12:27

Now ye. Ye Christians of Corinth, as a part of the whole church that has been redeemed.

Are the body of Christ. The allusion to the human body is here kept up. As all the members of the human body compose one body, having a common head, so it is with all the members and parts of the Christian church. The specific idea is, that Christ is the head of the whole church; that he presides over all; and that all its members sustain to each other the relation of fellow-members in the same body, and are subject to the same head. 1Cor 11:3. The church is often called the body of Christ, Eph 1:23, Col 1:18,24.

And members in particular. You are, as individuals, members of the body of Christ; or each individual is a member of that body.

(a) "members" Eph 5:30 (&) "particular" "in part"