The Description of the Human Body He believed the heat of the heart somehow caused all movement of the body. Blood vessels he realized were pipes, he saw that veins carried digested food to the heart. (This was brought further by William Harvey. Harvey developed the idea of the circulation of the blood.) Descartes felt that an energetic part of blood went to the brain and there gave the brain a special type of air imbued with vital force that enabled the brain to experience, think and imagine. This special air then went through the nerves to the muscles enabling them to move. The Description of
The Sacrament of the Body and Blood of Christ—Against the Fanatics both sides became more firmly entrenched into their positions. The Sacrament of the Body and Blood of Christ—Against the Fanatics The Sacrament of the Body and Blood of Christ—Against the Fanatics is a book by Martin Luther, published in late September or early October 1526 to aid Germans confused by the spread of new ideas from the Sacramentarians. At issue was whether Christ's true body and blood were present in the Lord's Supper, a doctrine that came to be known as the sacramental union. The of Christ's true body and blood in the Lord's Supper was a controversial issue at