The Cardiovascular System: Anatomy and Physiology from an herbalists perspective. This my absolute favorite diagram I used during nursing school at Jesuit!
Internal anatomy diagram of the human heart by Texas Heart Institute.
Diagram of the human heart (cropped) - Circulatory system - Wikipedia, the free encyclopedia
Cardiovascular System Anatomy and Physiology - Nurseslabs
Blood flow of the heart drawing
Details of the human back muscles. Most tips say that I should always rub muscles towards the heart.
Unit 17 Circulatory System Infographic: Find out all about the blood, lungs and blood vessels that make up the circulatory system.
Helpful Diagram of the Heart