Day 184: The Movement of the Mass

In the communion, preceded by the Lord's prayer and the breaking of the bread, the faithful receive "the bread of heaven" and "the cup of salvation," the body and blood of Christ who offered himself "for the life of the world": Because this bread and wine have been made Eucharist ("eucharisted," according to an ancient expression), "we call this food Eucharist, and no one may take part in it unless he believes that what we teach is true, has received baptism for the forgiveness of sins and new birth, and lives in keeping with what Christ taught." CCC 1355

In today's reading, the Catechism discusses the various parts of the Mass in more depth, from the Liturgy of the Word through to the reception of the Eucharist by the faithful. It really makes no sense to post the whole text for the Order of Mass as outlined in the Catechism today, best to read CCC 1348-1355 for oneself for that. I will say though that one of the most important parts of the Mass is that the bishop or priest is acting in persona Christi capitis, or "in the person of Christ the head." So in essence, it is Jesus our "Great High Priest" (Heb 4:14) through the minister that is offering Himself to the Father in each and every Mass. 

The Catechism Companion, Vol II makes some good comments on this:

Christ brings us the Eucharist at each Mass. While paintings and drawings depict the visible elements of the Mass, they often fail to portray the heavenly hosts and the presence of Jesus Christ himself. In the Eucharist, Jesus is not only present Body, Blood, Soul, and Divinity, but he is also present as the great High Priest... The Eucharist is not just a meal but also a sacrifice, and participating in this sacrifice is an integral part of the Mass. Jesus commanded us to do this in his memory. (p. 132)

A bit "cheesy Hollywood" perhaps, but this video does pretty much encapsulate what the Church believes happens at each and every Mass: