True: Your skin is water proof., Your lungs contain many alveoli to make sure there is lots of space for teh gases to get exchanged., You have two kidneys making urine all day long., Dialasis is used when someone's kidneys are not functioning., If you didn't go to the loo you would die of poisoning., Your skin is an organ., Your skin can regulate your temperature., Your brain is an organ that measures how much carbon dioxide you have and can remind you to breathe when you are alseep.,

TF Y( Homeostasis.

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