What is the circulatory system?

What is the circulatory system?

Find out how the circulatory system takes oxygen around the body.

What is in your blood?

What is in your blood?

Discover how blood vessels and blood cells help keep your body working.

What are blood vessels?

What are blood vessels?

Inside every person is an amazing network of blood vessels. Find out how they carry blood around the body.

How does your heart work?

How does your heart work?

Find out how the heart keeps all the blood in your circulatory system flowing.