Answer:
The hypothalamus stimulates the pituitary gland to secret ADH through blood and then is carried to the kidneys. The kidneys regulate the water content. Urine is produced in the kidneys. This is the bodies way of removing toxins. Urea is in the liver from the breakdown of unneeded proteins that can be poisonous. Onto the nephron they go which then is urea is filtered across the glomerulus.
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