The excretory system works directly with the system to allow blood to be filtered in the Kidneys Skeletal
Endocrine
Circulatory
Digestive

circulatory system allow blood to be filtered to the kidney

The circulatory system is correct

Explanation:

Good Job and I did this in health like last week!

are there any letter choices to this or is this an open ended question?

                                                        water

a colorless, transparent, odorless, tasteless liquid that forms the seas, lakes, rivers, and rain and is the basis of the fluids of living organisms.

                                                        halon  

any of a number of unreactive gaseous compounds of carbon with bromine and other halogens, used in fire extinguishers, but now known to damage the ozone layer.

                                                  dry chemical

extinguishing agent used on class a, class b, and class c fires.

                                                  carbon dioxide

a colorless, odorless gas produced by burning carbon and organic compounds and by respiration. it is naturally present in air (about 0.03 percent) and is absorbed by plants in photosynthesis.