the fluid produced by the kidneys as they remove waste chemicals from the blood is known as urine. this substance is made up of water together with some and dissolved in it. the concentration of each of these substances varies with a person’s , and .

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to this answer it would be edge enhancement

while the heads of the phospholipid structure attract water, the tails are hydrophobic. the model shows how the hydrophilic section folds around the fluid molecules to bring them into the cell so they don’t need to pass through the hydrophobic tails.