The mode of Christ’s presence under the Eucharistic species is unique. It raises the          Eucharist above all the sacraments as “the perfection of the spiritual life and the end to which all the sacraments tend.” In the most blessed sacrament of the Eucharist “the  body and blood, together with the soul and divinity, of our Lord Jesus Christ and, therefore, the whole Christ is truly, really, and substantially contained.”
Catechism of the Catholic Church, 1374