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 someone to eat the body and drink the blood of Jesus Christ means for that person to "dwell in Christ and to have Christ dwelling in him." To truly partake in the sacrament requires faith. Cranmer distinguishes Christ's "spiritual" presence from his "sacramental" presence. Avoiding the Lutheran doctrine of consubstantiation, he argues that the spiritual presence occurs only through Christ's divine nature, he being in heaven in regards to his human nature. Cranmer follows a symbolic reading of the phrase "This is my body", and develops a view "remarkably close to that developed by Zwingli and Oecolampadius." During the summer