We begin our look at how blood gets around your body. In this episode, we look at the basic three-layer structure of your blood vessels. We review how those structures differ slightly in different types of vessels. We will also follow...

Sal Khan clarifies several medical terms around heart disease. [7:52]

This video lesson from Khan Academy provides information about strokes. Students will learn basic information about the causes of strokes and how to prevent strokes.

This video lesson from Khan Academy provides information about strokes, one type of circulatory system disease. Students will learn basic information the ischemic core and penumbra.

This video lesson from Khan Academy provides information about the circulatory system. Students will learn basic information about the difference between arteries and veins. The differences among atherosclerosis, arteriosclerosis, and...