Mark 14:22

The bread Jesus ate would have been the unleavened bread that the Jews used in the Passover meal. The blessing Jesus pronounced was a prayer of thanksgiving to God for the bread, not a consecration of the bread itself. People, not places or things, are always the objects of blessings in the Bible. Jesus’ distribution of the bread to the disciples was more significant than His breaking of it. By passing it to them He symbolically shared Himself with them. When Jesus said, "This is my body," He meant the bread represented His body (cf. Luke 12:1; John 6:32-35). The disciples could hardly have eaten the literal flesh of Jesus since He was standing among them. Moreover the Jews abhorred eating human flesh and did not drink even animal blood much less human blood (cf. Leviticus 3:17; Leviticus 7:26-27; Leviticus 17:10-14). [Note: Riddle, p. 194.]

"The bitter herbs served to recall the bitterness of slavery, the stewed fruit, which possessed the consistency and color of clay, evoked the making of bricks as slaves, while the paschal lamb provided a reminder of God’s gracious ’passing over’ of Israel in the plague of death that came to Egypt." [Note: Lane, p. 505.]