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
When I Was One-and-Twenty that he understands the consequences, which is a broken heart, but shows no desire to the reader of preventing it. In the poem, the character is warned not to give his heart away out of lust, but to guard it with care as it is shown in this quote from the poem, “Give crowns and pounds and guineas, but not your heart away” (3-4). When the end of the poem is reached, the reader then understands the intention of the poem was not blithe, but the opposing adjective as Housman writes “I am two-and-twenty and oh ’tis true ’tis true”