Matching Pairs Circulatory systemOnline version Match the sentences related to the circulatory system. by Evaristo Jaén García 1 The blood vessels 2 It is in the middle of the chest. It works day and night to pump blood to every part of your body. 3 The blood is 4 The heart is 5 On the way it picks up nutrients and oxygen and drops off carbon dioxide and waste products a red liquid that goes arund the body. a muscle the size of your fist are thin tubes in which blood circulates around your body.