Digital Interactive Content

Systems (Circulatory)

The human circulatory system

The heart pumps blood through the blood vessels. Together, the heart, blood and blood vessels make up the circulatory system which transports substances to, and away from, different parts of our body!

Heart attack

Our circulatory system is essential in keeping all parts of our body alive by carrying oxygen to different cells. When our flow of blood is interrupted, cells do not receive the oxygen they need to survive and start to die within minutes!

Fish and human circulatory systems

The circulatory system of fish is a single circulation – blood passes through the heart once in each circulation. However, humans have a double circulation, in which blood passes through the heart twice in each circulation.

Plant transport system

The water carrying tubes , or the xylem, and the food-carrying tubes, or the phloem, make up the transport system in plants.