PATHOLOGY

Detailed explanation-1: -In the lungs, oxygen is put into the blood and carbon dioxide is taken out of the blood during the process of breathing. After the blood gets oxygen in the lungs, it is called oxygen-rich blood.

Detailed explanation-2: -Veins carry blood rich in carbon dioxide. This type of blood is also known as deoxygenated blood as all the oxygen from it has been transferred to the cells and the carbon dioxide released by the cells is absorbed into the blood.

Detailed explanation-3: -Pulmonary artery is the only artery that carries carbon dioxide rich blood to lungs for re-oxygenation.

Detailed explanation-4: -Veins carry carbon dioxide-rich or deoxygenated blood from all parts of the body back to the heart.