[2015] Sarah Irfan: Urinary system

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by ctrokay
Last updated 7 years ago

Human Anatomy

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[2015] Sarah Irfan: Urinary system

Urinary System

Four Main Functions




4 main processes involved in urine formation

4 main components of the urinary system

1) kidneys: filtration of the blood from waste products.2) ureters: transports urine from the renal pelvis of the kidney to which it is attached, to the bladder3) urinary bladder: stores urine prior to elimination of the urine from the body4) urethra: passageway through which urine is discharged from the body

1.) Removes metabolic wastes form the blood and excrete them outside the body.2.) Helps in controlling the rate of red blood cell formation by secreting the hormone erythropoietin3.) Helps to regulate blood pressure via the release of renin4.) Helps in regulating the volume, composition, and pH of the body fluids

1) Glomerular filtration: allows diffusible materials (water and small molecules) to pass from the blood into the nephron.2) Tubular reabsorption moves useful substances back into the blood while keeping waste products in the nephron for elimination3) Tubular secretion moves additional substances from the blood into the nephron for elimination. 4)concentration of the urine: reduces the volume excreted

3 normal constituents:1. Nitrogenous waste products2.Electrolytes3.Pigment

6 abnormal constituents 1. Sugar2. Protein3. Ketone bodies4. Billirubin and bile5. Blood 6. UT stone

3 Kidney disorders

Acute Prerenal Kidney Failure: caused by insufficient blood flow to the kidneys.Acute Intrinsic Kidney Failure: caused by direct trauma to the kidneys, such as physical impact, accidentsChronic Pre-Renal Kidney Failure: low blood flow to the kidneys is not treated and the condition remains for an extended period of time, chronic pre-renal kidney failure can occur.

When your kidneys fail, dialysis keeps your body in balance by: removing waste, salt and extra water to prevent them from building up in the body keeping a safe level of certain chemicals in your blood, such as potassium, sodium and bicarbonate helping to control blood pressure


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