Simplify the following text for a Grade 5 native English-speaking person.
Original: The blood is pumped by three separate hearts : two branchial hearts pump blood to the cuttlefish 's pair of gills ( one heart for each ) , and the third pumps blood around the rest of the body .
Simplified: The blood is pumped by three separate hearts . Two of these are used for pumping blood to the cuttlefish 's pair of gills ( one heart for each gill ) , and the third for pumping blood around the rest of the body .