Question

(05.03 LC)What discovery by William Harvey greatly advanced the study of physiology?
He explained how the nervous system works. He explained how muscles work. He explained the circulation of blood. He explained how the brain works.

Answer 1

I hope this helps: It's "He explained the circulation of blood".

Answer 2

And if that doesn't help, here's a site that should help you with your question: https://en.wikipedia.org/wiki/William_Harvey