Components of the circulatory/cardiovascular system

The three components are:
the heart
blood vessels
blood
is removed from the blood, and oxygen taken up by the haemoglobin in the red blood cells.
The systemic circuit carries blood around the body to deliver the oxygen and returns de-oxygenated blood to the heart. Blood also carries nutrients and waste.

is removed from the blood, and oxygen taken up by the haemoglobin in the red blood cells.