32.2 Studying the Muscular System – We learned that Italian artist Leonardo da Vinci was one of the earliest scientists to study and correctly portray the human muscular system. Da Vinci used dissection of human corpses to accurately and beautifully draw muscles. We discovered that muscle movement is necessary for moving food through the digestive system, pumping blood through the body, and the diaphragm moving air in and out of the lungs.