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
Defence of the True and Catholic Doctrine of the Sacrament of the Body and Blood of Christ Defence of the True and Catholic Doctrine of the Sacrament of the Body and Blood of Christ The Defence of the True and Catholic Doctrine of the Sacrament of the Body and Blood of Christ is a book by Thomas Cranmer, Archbishop of Canterbury. It was published in July 1550, and was Cranmer's first full-length book, but at his trial in September 1555, he said that it had been written seven years earlier, in 1548. Although Cranmer is concerned that "very simple and unlearned people" would understand and be edified by his book, the "Defence" is largely a polemic work,