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 circulatory system consists of three independent systems that work together: the heart (cardiovascular), lungs (pulmonary), and arteries, veins, coronary and portal vessels (systemic).

The cardiovascular system, also known as the circulatory system, includes the heart and blood vessels. It plays an important role in transporting blood to organs and tissues throughout the body.

Description of the human circulatory system which consists of the fluid called blood that is kept in circulation by the heart and the blood vessels.

Your circulatory system is how your oxygen-rich blood flows from your heart through your body, washing over all your vital organs, then returning oxygen-poor blood to your heart.

The circulatory system takes oxygen around the body. Find out more in this Bitesize Primary KS2 Science guide.

Mammals have bipartite blood circulation, i.e. pulmonary and systemic circulation. The heart is also divided: each circulatory system has an atrium and a ventricle, with the left and right halves of ...