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The Excretory System

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The Excretory System. Biology 12 Ms. Marcos. Why excrete?. We need to get rid of waste products : CO2 Bile pigments and heme (from blood) Nitrogenous wastes from breakdown of amino acids Ammonia (NH 3 ) is VERY TOXIC NH 3 converted to urea in the liver (less toxic) - PowerPoint PPT Presentation
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THE KIDNEY

Renal medulla

Renal cortex

Renal pelvis

Ureter

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Most systems produce urine by refining a filtrate derived from body fluids

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Renal cortexBowman’s capsule

Proximal tubule

Loop of Henle

Distal tubule

Collecting duct

Renal medulla

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