The blood stains on the Turin Shroud reveal they are of the blood group AB positive, the same as the Eucharistic Miracle of Lanciano and the Sudarium (Face-Cloth) of Christ.
The slice of human heart flesh preserved [and security sealed against fraud and theft] exhibits very interesting properties that are in keeping with the tradition of no matter the size of a consecrated host, it is the whole of Jesus the communicant recieves. A surgeon also commented that the way the heart tissue had been sliced would have been very difficult for a modern expert surgeon to achieve.
'The blood has congealed and is now in five clots in the glass chalice. In 1971 and 1981 a hospital laboratory tested the flesh and blood and discovered that the flesh is myocardium, that is heart muscular tissue, so we could say it is the heart of Jesus, the Sacred Heart, and the blood is of the blood group AB positive. In 1978 NASA scientists tested the blood on the Turin Shroud and interestingly also discovered that it is of the blood group AB positive. (The Sudarium, Face Cloth of Christ, mentioned in John 20:6 is also of the blood group AB positive.) Despite the fact that human flesh and blood should not have remained preserved for 1300 years the hospital lab tests found no trace of any preservatives . One final interesting point about the five blood clots in the chalice is that when you weigh one of them, it is the same weight as all five together, two of them together weigh the same as all five. In fact no matter what way you combine the blood clots individually or in a group to weigh them, they always weigh the same. (This shows that the full Jesus is present in a particle of the Eucharist no matter how small.)
Taken from: 'Homily for the Solemnity of Corpus Christi - the Body and Blood of Jesus' - by Fr. Tommy Lane.