Fun fact though you have 2 kidneys you can survive with 1 with no loss of life expantancy
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Fun Fact: Though you have 2 kidneys, you can survive with 1 with no loss of life expantancy PowerPoint PPT Presentation


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Fun Fact: Though you have 2 kidneys, you can survive with 1 with no loss of life expantancy. Homework Check: Circulatory System. Excretory System. Purpose: Body system that eliminates (or excretes ) nonsolid wastes through sweat, urine and exhalation to help maintain homeostasis in the body

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Fun Fact: Though you have 2 kidneys, you can survive with 1 with no loss of life expantancy

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Fun fact though you have 2 kidneys you can survive with 1 with no loss of life expantancy

Fun Fact: Though you have 2 kidneys, you can survive with 1 with no loss of life expantancy


Homework check circulatory system

Homework Check: Circulatory System


Excretory system

Excretory System

  • Purpose: Body system that eliminates (or excretes) nonsolid wastes through sweat, urine and exhalation to help maintain homeostasis in the body

  • What’s homeostasis?


Homeostasis

Homeostasis

  • Maintaining a stable internal environment


Waste products

Waste Products

  • Toxic Materials

  • Excess Water

  • Salts

  • Carbon Dioxide

  • Minerals

  • Vitamins

  • Urea (nitrogen-based)


Excretory system organs

Excretory System Organs

  • Lungs

  • Skin

  • Kidneys

  • Ureter

  • Urinary Bladder

  • Urethra


Lungs

Lungs

  • Excrete excess carbon dioxide and water vapor through exhalation

  • What’s happening to the diaphragm when we exhale?


Fun fact though you have 2 kidneys you can survive with 1 with no loss of life expantancy

Skin

  • Contains sweat glands that release excess water and salts, and help keep the body cool (homeostasis!)


Ureter

Ureter

  • Tube that carries urine from each kidney to the bladder


Urinary bladder

Urinary Bladder

  • Saclike organ that can store half a liter of urine at a time


Urethra

Urethra

  • Single tube that releases urine into the outside environment


Kidneys

Kidneys

  • Organs that eliminate wastes by filtering and cleaning the blood to produce urine

  • Kidneys maintain homeostasis by:

    • Removing waste products from blood

    • Maintaining electrolyte, pH and fluid balances

    • Releasing hormones that do things such as regulating blood pressure


Nephron

Nephron

  • An individual filtering unit of the kidney found in the cortex

  • Guess how many each kidney has.


Nephron1

Nephron

  • Our kidneys have 1 million nephrons!!!


Urine

Urine


Nephrons

Nephrons

  • Clean the blood in 3 steps:

    • Filtration

    • Reabsorption of Materials

    • Excretion of Materials


Filtration

Filtration

  • Theglomerulus is a tangled ball of capillaries

  • When blood enters the glomerulus, the pressure causes small molecules to be pushed out into Bowman’s capsule

    • Water

    • Amino Acids

    • Salts

    • Glucose

    • Electrolytes

    • Urea


Reabsorption of materials

Reabsorption of Materials

  • Materials in Bowman’s Capsule are called filtrate

  • Nephrons process 180 liters of filtrate a day = too much!

  • 99% of filtrate gets reabsorbed in the collecting duct as needed to ensure nutrient levels are stable


Excretion of materials

Excretion of Materials

  • The Loop of Henlereabsorbs water for the last time to reduce the volume of urine

  • The remaining liquid is urine that leaves through the ureter


Diabetes

Diabetes

  • Read the article about diabetes


Kidney disease

Kidney Disease

  • Loss of function in one or both kidneys

  • Two treatment options:

    • Dialysis

    • Transplant


Dialysis

Dialysis

  • Patients are attached to a machine that runs all of their blood through a semi-permeable membrane

  • A special fluid called dialysate is on the other side of the membrane, and diffusion allows for wastes to flow out of the blood

  • This process replicates kidney function


Transplant

Transplant

  • Patients can receive kidneys from living donors (usually relatives) or nonliving donors that recently passed away

  • Donors and receivers must be the same blood type

  • If you only have 1 kidney, the other will do the work of both with little problem


Pig hearts

Pig Hearts


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