The circulatory system is the network of tissues, blood vessels, lymph vessels, and supporting components that transports nutrients, respiratory gases, and metabolic products throughout a living organism.
The circulatory or cardiovascular system is composed of the heart, blood vessels and the blood. It delivers essential substances to the cells of the body.
The circulatory system has two divisions, a systemic circulation or circuit, and a pulmonary circulation or circuit. Some sources use the terms cardiovascular system and vascular system interchangeably with circulatory system.
It's also called the circulatory system. The arteries and veins carry blood all over the body. They send oxygen and nutrients to the body tissues. And they take away tissue waste. The lymph vessels carry lymphatic fluid. This is a clear, colorless fluid made of water and blood cells.