Fill in the Blanks The circulatory and the excretory systemsOnline version Text to be completed by the student. Unit 1. Natural Science 6 primary by Guillermo Ferrando Valverde 1 over organs all excretory transports organ kidneys circulatory heart waste The system blood the body . The is an of the circulatory system . The system eliminates the our body produces . The are of the excretory system .