Interesting details(Special features) The organ that pumps the blood around the body is the heart Arteries carry blood from the heart to all parts of the body and veins return blood to the heart. The main job of the blood is to carry oxygen and cell-building materials to every part of the body. Blood also helps to remove body wastes by carrying them to he organs that are responsible for getting rid of them or breaking them down into harmless substances. For example, blood cdrries carbon dioxide(a waste) back to the lungs, where it is breathed out and replaced with oxygen. The kidneys also remove wastes. They make sure the blood does not contain posons and that it has the right amount of water and salt in it Blood also carries cells that fight germs which enter the body and cause illness. Conclusion(Ending statement) Blood is the river of life flowing through the human body. An adult who loses a litre of blood suddenly will faint. If a person loses too much blood, he or she will die, Blood transfusions where new blood is given to a patient, are often performed to save a person's life. For these to be successful, the new blood must match the patient's blood type Many people's lives hove been soved by blood transfusions after an accident or illness. Blood banks store donated bloo of the different groups for use in emergencies or operations Translusions are also used to help people with certain illnesses, such as anaemia