1 / 6

Urinary System

Urinary System. MAIN FUNCTIONS. Ammonia (formed by the breakdown of old proteins) is converted to urea in kidneys Cleans the blood by removing urea, excess salts, water and metabolic wastes and excreting them as urine Keeps the volume of water in your body constant

slaurie
Download Presentation

Urinary System

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Urinary System

  2. MAIN FUNCTIONS • Ammonia (formed by the breakdown of old proteins) is converted to urea in kidneys • Cleans the blood by removing urea, excess salts, water and metabolic wastes and excreting them as urine • Keeps the volume of water in your body constant • Regulate blood pressure by renin (enzyme) • Stimulate production of RBCs by erythropoietin • Increase calcium absorption by calcitriol (vit. D)

  3. MAIN STRUCTURES Kidneys– filter blood and remove waste (maintain homeostasis) Nephron – filtering unit of the kidney (each kidney has a million nephrons)

  4. MAIN STRUCTURES CONT. Renal Capsule – connective tissue that surrounds each kidney Renal Cortex – outer part, lighter in color; contains parts of nephrons Renal Medulla – middle, darker part; contains parts of nephrons Renal Pelvis –inner part, collecting region of urine http://www.biologymad.com/resources/kidney.swf

  5. MAIN STRUCTURES CONT. Ureter – tube that takes urine from kidneys to urinary bladder Urinary Bladder – stores urine Urethra – allows urine to pass from the urinary bladder out of the body

  6. Factors that affect kidney function • Antidiuretic hormone (ADH) – prevents excess water loss from kidneys • Alcohol – inhibits secretion of ADH = more urine volume • Aldosterone – prevents excess loss of sodium and water from kidneys • Caffeine – increases rate of salt and water loss from kidneys • Increased blood pressure – increase rate of water loss from kidneys.

More Related