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Chapter 16.docx

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Health Sciences
HSCI 100
Nienkevan Houten

Chapter 16MAINFUNCTIONS1Excretion of metabolic wastes2Maintenance of watersalt balance3Maintenance of acidbase balance4Hormone secretionCOMPONENTSOFTHEURINARYSYSTEMConsists of 2 kidneys 2 ureters and 1 urinary bladder and 1 urethraThe kidneys are the organs of the urinary system that accomplishes this task by regulating the amount of water and dissolved substances that are removed from and returned to the blood Peristaltic contractions begin where the urines leave the kidney and travel down the ureters pushing urine toward the urinary bladderUrinary bladder stores the urine until it is excreted out of the bodyUrine leaves the body through urethra a tube that transports urine from the urinary bladder to the out of the body KIDNEYSANDHOMEOSTASISReddish brown colour and shaped like kidney beans Covered and supported by several layers of connective tissuesOutermost layer is tough fibrous layers that anchors each kidney and its adrenal gland to the abdominal wall and surrounding tissuesBeneath that is a protective cushion of fat Innermost layer covering the kidney is a layer of collagen fibre that protects the kidney from trauma Structure of kidney 3 regionsOuter regionthe renal cortexenclosed by the cortex renal medulla
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