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kaihalojr
A frog gets rid of it's urine through the kidneys because the heart pumps blood throughout the body, the lungs are used to take in O2 molecules and gills are use to filter out the hydrogen in HO2 so they can breathe under water. However the kidneys are part of the waste disposal system (what makes us need trip to the bathroom ever now and then) therefore that is the answer.
xXxBubblesxXx
The answer is---> Kidneys

A frogs excretory system is made up of the kidneys, bladder, ureters, and cloaca. The kidneys are in charge of filtering blood and removing the urea and converting it to urine. The ureters are connected to kidney and urine passes through a tube into the bladder. The bladder of a frog is the same as it is in a human.

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