Jesus Christ is present in the Holy Eucharist, whole and entire, under the appearance of bread and wine. He is simultaneously present in every single sacred host on every altar throughout the world, and under the appearance of wine in every single consecrated chalice whenever Mass is being offered. Moreover, Jesus is present, whole, and entire, in every part of every sacred host, and in every drop contained in the consecrated chalice. If a crumb were to drop from the sacred host, or a drop were spilled from the chalice, Jesus would be present in that crumb and in that drop.
The Faith Explained, Leo Trese, Scepter Press, p. 363