1 GCSE Biology resources Search within results Go How ratings and recommendations work Apply Filter resourcesClear all filtersLevelClear filter GCSE SubjectClear filter Biology Exam board Edexcel TopicClear filter B3 Urinary system, Kidney structure & Osmoregulation Control Systems Resources Mindmap B3 Urinary system, Kidney structure & Osmoregulation GCSE, Biology Mindmap Search again