Kidney - Removes waste like urea from blood and balances fluid levels.  , Ureter - Narrow tubes transport urine to bladder, Bladder - Hollow organ that expands to store urine, Testes - Site of sperm production, Ovaries - Site of oocyte production and releases hormones estrogen and progesterone,

Urogenital System Structure & Function

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恢復自動保存: ?