Question

how was harvey’s idea of the human body different from galen?

Explanation:

William Harvey and Galen had different views on the human body, especially regarding blood circulation. Galen thought blood was produced in the liver and consumed, with some flowing to the heart for "vital spirits." Harvey proved blood circulates: the heart pumps blood, arteries carry it away, veins return it, and the heart recirculates it, contradicting Galen's consumption idea. Also, Galen's view on heart - lung interaction (he thought the heart cooled blood from the lungs) was wrong; Harvey showed the heart's pumping role in circulation.

Answer:

Galen believed blood was produced in the liver and consumed, with some going to the heart for "vital spirits", and thought the heart cooled blood from the lungs. Harvey demonstrated blood circulates: the heart pumps blood, arteries carry it, veins return it, and the heart recirculates it, refuting Galen's blood - consumption and heart - lung - function ideas.