The Holy Eucharist is the Whole Christ | Rev. John A. Hardon, S.J. [Soul Magazine, 1994]
The most fundamental question to ask about the Blessed Sacrament is, "Who is the Holy Eucharist?" And the correct answer is: The Holy Eucharist is Jesus Christ.
Bible Proves Real Presence of Christ in Eucharist | Rev. Daniel Maher [Provided Courtesy of: Eternal Word Television Network, 2003]
A detailed article examining biblical evidence for the real presence.
The Signs of Bread and Wine
Good analysis of the Catholic understanding of the Eucharist, related to its symbols, drawing on the Catechism of the Catholic Church, and contrasting it with Protestant theology.