Download The Circulatory System – Fact Sheet

The Circulatory System – Fact Sheet
The heart requires its own constant blood supply in order to keep beating
and this is delivered through the coronary arteries. Genetic and lifestyle
factors can lead to the coronary arteries becoming blocked, and an
increased risk of heart disease.
The circulatory system
The diagram outlines the circulatory
system. To make things clear,
oxygenated blood is shown in red, and
deoxygenated blood in blue.
The circulatory system
Blood carries oxygen and nutrients to the body’s cells, and waste products away
from them. The circulatory system consists of:

the heart, which is the muscular pump that keeps the blood moving

the arteries, which carry blood away from the heart

the veins, which return blood to the heart

the capillaries, which are tiny blood vessels that are close to the body’s
cells.