The cardiovascular system carries oxygen and nutrients to all of the cells in the body. It also picks up carbon dioxide and other waste products that the body produces so that they can be disposed of. The main components of this system are the heart, blood vessels, and blood. The heart's job is to pump blood through a network of blood vessels. Blood vessels carry the blood that the heart pumps throughout the body and back to the heart again. Blood flows throughout the body, carrying oxygen and nutrients to all of the body's cells and taking away the waste products that they produce.

 

The cardiovascular system is complex and, as with anything, problems can occur within it. These problems could occur anywhere from the electrical system of the heart to the large or small blood vessels. When a problem develops within the cardiovascular system, it is known as a cardiovascular disease.