Select all that apply Which contributions to medicine were made by William Harvey? \( \square \) He was the first to dissect human bodies. \( \square \) He discovered the liver. \( \square \) He proved that the same blood flows through veins and arteries. \( \square \) He showed that blood circulation begins at the heart.

William Harvey made several significant contributions to medicine, particularly in the understanding of blood circulation. Let's evaluate each statement: 1. **He was the first to dissect human bodies.** - This statement is **not true**. While Harvey did perform dissections, he was not the first to do so; dissection of human bodies had been practiced by others before him. 2. **He discovered the liver.** - This statement is **not true**. The liver was known long before Harvey's time, and he did not discover it. 3. **He proved that the same blood flows through veins and arteries.** - This statement is **true**. Harvey demonstrated that blood is circulated throughout the body in a closed system, flowing through both veins and arteries. 4. **He showed that blood circulation begins at the heart.** - This statement is **true**. Harvey's work established that the heart is the central organ of blood circulation, pumping blood throughout the body. Based on this evaluation, the correct contributions made by William Harvey are: - \( \square \) He proved that the same blood flows through veins and arteries. - \( \square \) He showed that blood circulation begins at the heart.