Human urinary excretory system
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Human urinary excretory system

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    Human urinary excretory system  Human urinary excretory system Presentation Transcript

    • Human Excretory urinary System The kidney- grade 11
    • Structure of the urinary excretory system
    • This system includes 4 main organs: Kidneys Bladder Excretory system Urethra ureters
    • Main function of the urinary System  The human excretory system functions to remove waste from the human body.  During urination animals get rid of nitrogenous waste products of metabolism, including ammonia, urea, and uric acid.
    • The internal & external structures of a kidney
    • The flow of urine inside the kidney Glomerulus Renal tubules Renal pelvis Ureter Renal calices
    • Purpose of a kidney  Filters blood, redirecting wastes as urine through the ureter and to the urinary bladder and out of the body via urethra.  Each kidney consists of millions of nephrons – the fundamental units of the kidney
    • Structure of a nephron
    • What is a nephron? A functional unit of a kidney. Blood enters the nephron at the Bowman’s capsule and is filtered by the glomerulus, a ball of capillaries. Bowman’s capsule collects filtrate, plasma forced out of the blood. Filtrate passes through the entire nephron becoming modified into urine.
    • Blood Flow through the Kidneys Blood enters via renal artery Arterioles Nephron Renal corpuscle
    • The 3 processes of blood purification inside the kidneys.
    • Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Bowman's capsule Glomerulus Filtration Reabsorption to blood Secretion from blood Renal tubule Excretion
    • The remaining urine goes to the collecting duct and into the ureters, the bladder and out of the body via the urethra.
    • Normal & abnormal flow of urine
    • References The slides above have been re-purposed from the following presentation links from slideshare: http://www.slideshare.net/itutor/excretory-system23183659?qid=6d3c0d3b-e56c-4c57-83c098fbae82b3eb&v=qf1&b=&from_search=1 http://www.slideshare.net/jgthatsme/excretorysystem?qid=9ee1584a-3dda-4d5a-b11be75b5400133f&v=qf1&b=&from_search=1 http://www.slideshare.net/132cool/excretory-system8430788?qid=81f3882c-84d0-46f6-867b782728c2fc79&v=default&b=&from_search=12
    • 201125991 Ledwaba .M