Your circulatory system moves 2,000 gallons of blood a day and more, depending on how active you are. Learn more about this important body system.
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.
In vertebrates, the circulatory system is a system of organs that includes the heart, blood vessels, and blood which is circulated throughout the body. It includes the cardiovascular system, or vascular system, that consists of the heart and blood vessels (from Greek kardia meaning heart, and Latin vascula meaning vessels). The circulatory system has two divisions, a systemic circulation or ...
The human circulatory system or cardiovascular system is a network responsible for transporting blood, oxygen, nutrients, hormones, and waste products throughout the body. It consists of the heart, blood vessels, and blood. This complex system ensures that every cell receives the resources needed for survival while removing metabolic waste products, maintaining homeostasis.
The circulatory system is a masterpiece of biological engineering—a living infrastructure that connects every cell, every organ, and every function within your body. From the heart’s rhythmic pulse to the capillaries’ silent exchanges, from immune responses to hormone delivery, it is the lifeline that sustains you.
Your circulatory or cardiovascular system serves a vital function by delivering oxygen and nutrients to all the organs and tissues of your body. Learn more about how the circulatory system works ...
The cardiovascular system, also known to some as the circulatory system, consists of the heart, blood vessels, and blood. Learn more about it here.