The circulatory system is a complex collection of the heart and its many chambers, and the vessels that move blood around the body. At first glance, it can be difficult to grasp.
Whether you have an upcoming test on the circulatory system, are looking for a deeper understanding, or just need a refresher the following video is for you. You may be confused about the difference between arteries and veins, or you may believe some common circulatory system myths.
The video, from Khan Academy, does a beautiful job of explaining the differences between arteries and veins. It also works to dispel some cardiology myths.
One of the most commonly believed oversimplifications concerning the veins and arteries is that they move the oxygenated blood and oxygenated blood respectively. Although not entirely incorrect, this oversimplification of the circulatory process is somewhat misleading. For example, the pulmonary artery moves deoxygenated blood but is, in fact, an artery.
Find out why this is and more from this well illustrated, easy to understand, informative video from Khan Academy.