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Hand-in worksheet on the Excretory/Urinary System

Hand-in worksheet on the Excretory/Urinary System. KEY CONCEPT The excretory system removes wastes and helps maintain homeostasis. skin. lungs. kidneys. ureters. urinary bladder. urethra. The excretory system eliminates nonsolid wastes from the body.

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Hand-in worksheet on the Excretory/Urinary System

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  1. Hand-in worksheet on the Excretory/Urinary System

  2. KEY CONCEPTThe excretory system removes wastes and helps maintain homeostasis.

  3. skin lungs kidneys ureters urinary bladder urethra The excretory system eliminates nonsolid wastes from the body. • Nonsolid wastes are eliminated through lungs, skin, and kidneys. • Lungs exhale carbon dioxide and water vapor. • Sweat glands in skin release excess water and salts. • Kidneys filter and clean the blood to produce urine.

  4. Kidneys have three basic functions in maintaining homeostasis. • remove waste from blood • help to maintain electrolyte, pH, and fluid balances • release key hormones

  5. cortex medulla renal artery renal vein ureter (to bladder) The kidneys help to maintain homeostasis by filtering the blood. • Kidneys are a pair of bean-shaped organs. • two layers: medulla and cortex • filtering units called nephrons • renal artery and renal vein

  6. from body to body to body from other nephrons loop of Henle Nephrons clean the blood and produce urine. • 4. Glomerulus-filters and cleans the blood • 5. Bowman’s Capsule-holds the filtrate, molecules are reabsorbed into the capillaries to balance the blood chemically • 6. Loop of Henle- • Water is reabsorbed. • 7. Collecting ducts- • collect urine from • nephrons and • send it to the • ureter.

  7. from body to body to body from other nephrons loop of Henle Nephrons clean the blood and produce urine. • Nephrons are the filtering units in the kidneys. • They clean and rebalance the blood to produce urine.

  8. 1 FILTRATION Water,electrolytes,aminoacids,glucose,urea, and other small molecules diffuse out of the blood,creating the filtrate. Glomerulus Bowman’scapsule • Nephrons clean the blood in a three-step process. • The first step is filtration of the blood.

  9. 2 REABSORPTION As the filtrate enters the rest of the tubule ,most of the materials are reabsorbed into the blood.Materials not reabsorbed make up the urine,which flows into the loop of Henle. from body 3 EXCRETION In the loop of Henle,water can be reabsorbed one final time to reduce the volume of urine.The remaining urine flows into a collecting duct that leads to the ureter. collecting duct to body from other nephrons loop of Henle • The first step is filtration of the blood. • The second step is reabsorption of materials. • The third step is excretion of materials.

  10. The daughter and son in this photo donated a kidney and liver tissue to their mother. Injury and disease can damage kidney functions. • A kidney transplant can replaced damaged kidney. • recipient and donor tissue must match • drugs prevent tissue rejection

  11. 1st-finish lab analysis • 2nd-collect research from Fri. • 3rd-finish handout on Excretory system • 4th – new work handout “The Urinary System” • TEST WED.

  12. Dialysis can be used to filter and clean the blood.

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