| Urinary System | |||||||||||||||||||||||
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| Major disorders | |||||||||||||||||||||||
| Structure and functions of Urinary system: 1) Pair of kidneys: function in removing substances from blood to from urine. 2) Pair of Ureters: function in transporting urine from kidneys to urinary bladder. 3) Urinary bladder: functions as urine resevoir that takes in urine from ureters. 4) Urethra: takes urine from bladder to outside of body. 5) Renal arteries and veins: carry blood to be filtered to kidneys and carries filtered blood away from kidneys. |
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| Kidneys - Functions: to regulate the volume, composition and PH of body fluid. - Consists of three layer portions: Renal cortex (outer), medulla, and Renal pelvis (connected to ureter) - Covered by Renal capsule - Consists of approximately 1 million nephrons (functional units vertebrate kidney) |
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| Kidney nephron | |||||||||||||||||||||||
| - Nephrons are selective filter elements that regulate the coposition of the blood and excrete wastes from blood. - Glomerulus is a capillary network which fits into Bowman's capsule. - Urine and wastes are transported to the collecting duct to the ureter. |
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| Control of Kidney functions ADH (Anti-diuretic hormone): target the kidney; produced in hypothalamus, and stored and released from Pitutuary gland. - Stimulates distal tubules and collecting duct to reabsorb more water. |
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| Factors that inhibit ADH releases - High fluid intake, high blood volume - low blood sodium level - Alcohol consumption Consequences: Water reabsorption decreases,and urine output increases because kidneys are unable to reabsorb or conserve water. |
Factors causing ADH release - low fluid intake, blood volum - High blood sodium levels - Nicotine - Morphine Consequences: water reabsorption increases, and Urine output decreases. Resulting diarrhea, and excessive sweating. |
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| web related to urinary system | |||||||||||||||||||||||
| web related to urinary system | |||||||||||||||||||||||