An image of heart and blood vessles; veins are blue and arteries are redCardiovascular Foundations

Preparations for Interpreting about the Cardiovascular System

Activity 1.3

A Lecture on the Cardiovascular System from the Khan Academy
Other Resources (Optional)

Information from

The following link provides a basic overview of how the circulatory system works.


In its most basic form, the circulatory system is a simple loop which starts, and ends, at the heart. It is also a closed system in the sense that blood does not enter or leave the system during its journey from the heart, to the body, and back again. In such a system, a continuous flow of the same liquid can be pumped through the loop again and again.


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