The Parts of the Mass
The Mass is seen as having two parts: The Liturgy of the Word and The Liturgy of the Eucharist. But it must be remembered that these are so closely interconnected that they form but one single act of worship.
The Liturgy of the Word is made up of the First Reading, Responsorial Psalm, Second Reading, Gospel Acclamation, Gospel, Homily, Profession of Faith (on Sundays, solemnities), and the Universal Prayer. The Liturgy of the Word, up to the Creed, was once known as “The Liturgy of the Catechumens,” because this was the only part of the Mass in which those who were not baptized members of the Church were able to participate. We still see this in the dismissal of our OCIA participants after the homily.
The Liturgy of the Eucharist is made up of the Presentation of the Gifts and Preparation of the Altar, Prayer over the Offerings, Eucharistic Prayer (including the Preface, Holy, Holy, Holy, Mystery of Faith, and ending with the doxology), The Lord's Prayer, Sign of Peace, Lamb of God, the reception of Communion, and ends with the Prayer after Communion.
You may notice that a few things are missing. Where is the Penitential Rite? the Gloria? the Dismissal?
Before the Liturgy of the word begins, there are the Introductory Rites, consisting of the Entrance, Greeting, Penitential Act, Glory to God, and the Collect (colloquially known as “the opening prayer”).
At the end of the Mass, after the Liturgy of the Eucharist, there are the Concluding Rites, consisting of the (optional) announcements, Greeting and Blessing, and Dismissal.
