Catechism of the Catholic Church

The liturgy of the Eucharist unfolds according to a fundamental structure which has been preserved throughout the centuries down to our own day. It displays two great parts that form a fundamental unity: (103) - the gathering, the liturgy of the Word, with readings, homily, and general intercessions; - the liturgy of the Eucharist, with the presentation of the bread and wine, the consecratory thanksgiving, and communion. The liturgy of the Word and liturgy of the Eucharist together form "one single act of worship"; the Eucharistic table set for us is the table both of the Word of God and of the Body of the Lord.