The three ministries of holy orders?

Within the Catholic Church, three major Holy Orders exist: Bishopric, Presbyterate, and Deaconate. The first, Bishopric, contain Bishops, people believed to be considered the successors of the Twelve Apostles. Presbyterate contains the priests, who are deemed to participate in the priesthood of Christ Himself. The Deaconate contains the deacons, assistants to the bishops, and responsible for tasks such as distributing food.