Completar Frases Bruno 22/02Versión en línea Bruno 22/02 por María Romera 1 kidneys excretory trac urinary The system is formed by the and the 2 tract urinary bladder urethra kidneys ureters The are two dark brown organs on each side of the spine , above the abdomen . The is made up of two tubes called which connect the kidneys to a storage bag called the . This is connected to the , which is the part that leads to the outside of our body . 3 blood substances waste The kidneys filter the and collect . 4 urethr urine waste substances bladder ureters water The kidneys also produce , consisting of and . It travels through the and is stored in the . Finally , it is released through the
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