Freshwater fish pass a urine with a concentration that is ________________ relative to their blood.

Name: Freshwater fish pass a urine with a concentration that is ________________ relative to their blood.
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Freshwater fish have blood that is more concentrated than their surroundings, so they need to excrete excess water and ions to prevent the uptake of too much water. Their urine is therefore hypoosmotic, meaning it has a lower concentration of solutes than their blood.

Freshwater Fish Pass a Urine with a Concentration That Is