This worksheet includes all the major part of the heart including the blood vessels. I have drawn it in such a way as to be easier to understand by students. After many years of teaching about the structure of the heart and having students draw it with chalk and walk through it, I think this drawing is the best for understanding the flow of blood through the heart. Hope you think so too! You can use it as a preview or as a review. It could also be an assessment.
Coloring is not just for grade school as evidenced by the best selling Anatomy, Biology, etc. coloring books out there for advanced science.