Find out what blood is and what role it plays as it circulates through a network of blood vessels over 100,000 kilometres long.
- The heart pumps 8000 litres of blood a day.
- Oxygen is delivered to organs and tissue, whilst carbon dioxide waste is removed via blood vessels.
- Arteries carry oxygenated blood away from the heart.
- Veins carry deoxygenated blood to the heart.