Liquid Excretion: removal of liquid wastes & water/salt balance

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Liquid Excretion: removal of liquid wastes & water/salt balance
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Presentation transcript:

Liquid Excretion: removal of liquid wastes & water/salt balance Ch 38.3 The Urinary System

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

Forms of Nitrogen Wastes Toxicity Environment& removal 1. Ammonia Most Water by diffusion 2. Urea Less Land @ kidney as urine 3. Uric Acid crystal Least Air & Deserts as A dry crystal

Protein Building blocks: H-N H R.Gr. C=OH H Amino NH2 Acid COOH

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

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

Nephron: Unit of filtration

Water levels in urine under control of Hypothalamus & ADH hormone

Kidney Transplants:

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