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
Personal relationships of James VI and I Castle as a guest but then kept him as prisoner for ten months. The Lord Enterprisers forced him to banish Lennox. The duke journeyed back to France and kept a secret correspondence with James. Lennox in these letters says he gave up his family "to dedicate myself entirely to you"; he prayed to die for James to prove "the faithfulness which is engraved within my heart, which will last forever." The former duke wrote "Whatever might happen to me, I shall always be your faithful servant... you are alone in this world whom my heart is resolved to serve. And