Genesis 14:18
Melchizedek, priest of God, brought bread and wine.
According to the Catechism, CCC 58, King-Priest Melchizedek pre-figures Jesus Christ.
To me this is a direct correlation to the blood and body of Christ.
Melchizadek definitely prefigures Christ, and his offering of bread and wine prefigures the Eucharist. During ordination, a priest is told he is a priest forever, according to the order of Melchizadek.
The Catholic Encyclopedia tells us Melchizadek was also a king, so he is doubly a type of Christ. You can read the CE entry here. His name was also mentioned in the old Roman Canon of the pre-Vatican II mass.
____________________ Understanding is the reward of faith. Therefore seek not to understand that you may believe, but believe that you may understand. - Augustine