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Liquid Excretion: removal of liquid wastes & water/salt balance Ch 37.3 The Urinary System.

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Presentation on theme: "Liquid Excretion: removal of liquid wastes & water/salt balance Ch 37.3 The Urinary System."— Presentation transcript:

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2 Liquid Excretion: removal of liquid wastes & water/salt balance Ch 37.3 The Urinary System

3 Nitrogen wastes are excreted & cycled Nitrogen in Plant & animal protein Ammonia nitrogen Is excreted in urine Bacteria convert Ammonia to usable Nitrate fertilizer

4 Forms of Nitrogen Wastes Nitrogen form ToxicityEnvironment& removal 1. AmmoniaMostWater by diffusion 2. UreaLessLand @ kidney as urine 3. Uric Acid crystal LeastAir & Deserts as A dry crystal

5 Protein Building blocks: Amino NH 2 Acid COOH

6 Nitrogen waste from Protein Breakdown Kidney filters the blood Removes urea waste Recycles food, water & salt Urine = urea waste, water & salt

7 Bladder stores Urine made by Kidneys Ureter tubes Carries urine to urethra

8 Nephron: Unit of filtration

9 Water levels in urine under control of Hypothalamus & ADH hormone

10 Kidney Transplants:


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