Fill in the Blanks Fill in the Blanks - Circulatory SystemOnline version Test your knowledge of the circulatory system by filling in the missing words in this educational game! by Raquel Gross 1 oxygen body cells double circulatory system blood vessels lungs nutrients arteries homeostasis heart exchange of substances capillaries Circulatory System carbon dioxide veins Topic B2 AQA GCSE : The circulatory system is responsible for transporting substances like , , and around the body . It consists of the , , and blood . The heart pumps blood around the body in a . The blood vessels include , , and . Arteries carry blood away from the heart , veins carry blood back to the heart , and capillaries allow for the between the blood and body tissues . The blood carries oxygen from the to the and carbon dioxide from the body cells to the lungs for removal . The circulatory system plays a vital role in maintaining in the body .