(1) Overview of the Excretory system.pdf - Excretion OVERVIEW OF THE EXCRETORY SYSTEM The process of separating wastes from body fluids and eliminating

(1) Overview of the Excretory system.pdf - Excretion...

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8/25/16 1 OVERVIEW OF THE EXCRETORY SYSTEM Section 10.1 Excretion ¨ The process of separating wastes from body fluids and eliminating the wastes from the body. ¨ Most metabolic wastes are dissolved in solution and excreted by the excretory system (urinary system). Excretory System ¨ This system produces urine in the kidneys and delivers it out of the body. ¨ Main functions: ¤ Excretion of metabolic (mainly nitrogenous) wastes ¤ Maintenance of water-salt balance to regulate blood pressure ¤ Maintenance of acid-base balance to regulate blood pH ¤ Secretion of hormones such as calcitriol (active form of Vitamin D), erythropoietin (stimulates red blood cell production) and renin (induces the secretion of aldosterone). The Organs of the Excretory System The Kidneys ¨ Each kidney has two major blood vessels: ¤ A renal artery – delivers oxygenated blood to the kidney ¤ A renal vein – which drains deoxygenated blood from the kidney.
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  • Winter '16
  • Renal vein

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