A circulatory system (sometimes cardiovascular system) is an organ system that moves substances to and from cells; it can also help stabilize body temperature and pH (part of homeostasis). There are ...

Arteries are blood vessels. Most carry oxygen-rich blood from the heart to various organs and tissues. Arteries are a part of the circulatory system, along with the heart and other blood vessels. The ...

The Curious Crew gets pumped exploring the circulatory system! The Curious Crew gets pumped exploring the circulatory system! Dr. Rob uses balloon valves and tennis balls to explain how the heart ...