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Urinary System

1) The average person pees about 3000 times a year. 2) Most people, on average, would breath about 6,286,920 times a year. 3) The human intestine is usually 27 feet long and 10 inches. (8.5 meters long) .

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Urinary System

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  1. 1) The average person pees about 3000 times a year.2) Most people, on average, would breath about 6,286,920 times a year.3) The human intestine is usually 27 feet long and 10 inches. (8.5 meters long) .

  2. 4) The average adult bladder can hold 16-24 ounces of urine.5) A liver would be about 3 pounds in an average human. 6) The liver is rubbery to touch. 7) One kidney (aproximately) measures to about 4 inches. .

  3. 8) The average person's lung measures about 12 inches.9) An average person sheds from about 30000 to 40000 skin cells every minute.10) The average person poops about 305 pounds a year.

  4. Urinary System

  5. The urinary system is also called the genitourinary system, the urogenital system and/or the excretory system. • This is a little confusing so…

  6. The term excretory system actually refers to all of the systems that help excrete waste from your body. • It is made up of several systems. Including…?

  7. While the genitourinary system and/or the urogenital system groups the urinary and some of the reproductive organs together because of…

  8. their proximity to each other, • the use of common pathways, ex: male urethra. And • their common embryological origin

  9. ***because of their location, the two systems are sometimes diagnostically imaged together.

  10. The urinary system is made of the • Kidneys (2) • Ureters (2) • Bladder (1) • Urethra (1)

  11. Function of the Urinary system… In one word!!! • Homeostasis!

  12. So… What is … • Homeostasis! • Homeo- constant, same • Stasis- equilibrium, balance

  13. So… Homeostasis! Refers to the process of keeping a constant state of balance among all of your bodily activities.

  14. So… what does your urinary system keep in balance? • the concentrations of various ions and other important substances constant. Na+, Cl-, K+, HPO4-2,HCO3-1, CO2

  15. 2. the volume of water in your body and blood stream 3. The pH or acid/base concentration of your blood

  16. Acid-Base Balance • pH below 7.35 = acidosis • pH above 7.45 = alkalosis • Affect all systems but nervous system and cardiovascular very sensitive to fluctuations • Severe acidosis deadly b/c: • CNS function deteriorates • Individual becomes comatose • Cardiac contractions grow weak and irregular • Symptoms of heart failure • Peripheral vasodilation • Dramatic drop in bp; circulatory collapse

  17. 4. your blood pressure 5. Your volume of red blood cells 6. The amount of calcium in your body

  18. 7. The cleanliness of your blood by removing wastes from your body (urea, ammonia, drugs, toxic substances)

  19. How does the Urinary system work? Very simply… By filtering your blood! • The Kidneys receive the blood from the renal artery, • process it,

  20. return the processed blood to the body through the renal vein • remove the wastes and other unwanted substances in the urine.

  21. Urine flows from the kidneys through the ureters to the bladder. is stored in the bladder until it is excreted from the body through the urethra.

  22. The nephron is the basic unit of the kidney. • Each kidney is made up of about one million nephrons

  23. A nephron is made up of a long thin tube that is closed at one end, has two twisted regions interspaced with a long hair-pin loop, ending in a long straight portion and is surrounded by capillaries.

  24. These tiny, tubular structures stretch across both regions (cortex and medulla) perpendicular to the surface of the kidney. • It is in the nephron that filtration and reclamation occurs.

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