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Excretory system


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  • 1. By Erin Murphy andJeffrey Edgecomb
  • 2. • Gets rid of waste• Eliminates useless byproducts excreted fromcells• Destroys harmful chemical buildups• Maintains a steady and balanced chemicalconcentrationFunction of Excretory System
  • 3. Skin:• Sweat glands in the skin secrete a fluid waste called perspiration• Sweat helps regulate the body’s concentration and keep it coolLungs:• Diffuse gaseous wastes, such as carbon dioxide from the bloodstream as anormal part of respiration• Maintain life supporting levels of carbon dioxide and oxygenKidneys:• Blood passes through the kidneys to deposit used and unwantedwater, minerals, and a nitrogen-rich molecule called urea• Filters waste from the blood and produces urineLiver:• Regulates glycogen storage, plasma protein synthesis, and drugdetoxification• Secretes bile• Converts toxic ammonia into ureaMajor Organs and Their Functions
  • 4. Urinary Bladder:• Stores urineBile:• Substance produced by the liver used to break down fats, ethanol andacidic wastesUrethra:• Carries the urine from the bladder out the bodyEccrine:• Eccrine glands secrete mostly salt and water used to controltemperatureLarge Intestine (Colon):• Removes solid waste from the body, and collects water from the wasteto be reusedMajor Organs and TheirFunctions Continued
  • 5. • Processes about 200 quarts ofblood and produces about 2quarts of waste per day• Produces urine which istransported to the bladderthrough ureters• If the kidneys didn’t removewaste from the blood it wouldbuild up and damage the body• Kidney contains tiny capillariescalled nephrons that removewaste from the blood• Nephrons also measure certainchemicals and release the rightamount back into the bloodKidney
  • 6. Kidney StonesKidney stones are hard masses that form in the urinarytract from crystals that have separated from the urine.The exact cause of kidney stones is unknown, but thosewith certain genetic disorders, kidney disorders andreoccurring urinary tract infections are more likely todevelop kidney stones.
  • 7. Urethritis is an inflammation of the urethra caused by abacterial or viral infection. Symptoms of urethritis varybetween sexes. A symptom in men can be seen asblood in the urine or semen or even a dischargecontaining puss. In women, abdominal pain, painduring urination and fever may occur.Urethritis
  • 8. Circulatory:Blood that circulates through the body passes throughone of the two kidneys. Urea, uric acid, and water areremoved from the blood and most of the water is putback into the systemEndocrine:Monitors levels of compounds and fluidsKidney function must be constantly altered to providethe best internal environment for your cellsIf too much water is present, hormones are released thatallow for more urine production. If the body isdehydrated, less urine will be producedAdrenal gland position on the top of each kidney.Adrenals release adrenaline into your bodyHow it Works with Other Systems
  • 9. Major Organs Diagram
  • 10. The liver converts toxic ammonia to urea and releases it intothe blood.Blood circulates through the kidney and the kidney collectswaste from the blood using nephrons.Nephrons produce urine with the excess waste and processnecessary chemicals back into the blood.Urine is carried to the urinary bladder through ureters and exitsthrough the urethraBile helps breaks down solid waste and the large intestine orcolon removes the solid waste from the body and reuses excesswaterWaste Removal
  • 11. • The average person releases 305 pounds of feces a year• The average person pees about 3,000 times a year• The average adult bladder can hold 16-24 ounces of urine• Water forms 95% of urine• An estimated 7,850,000,000,000 gallons of fluid passes throughthe bladder and out through the urethra in an average person’slifetime5 Fun Facts
  • 12. • "THE EXCRETORY SYSTEM." Excretory System. N.p., n.d. Web. 09 May 2013• "Google." Google. N.p., n.d. Web. 09 May 2013.• “EXCRETION IS NOT ELIMINATION." Animal Systems:Excretory System. N.p., n.d. Web. 09 May 2013.• "Common Excretory System Diseases." LIVESTRONG.COM. N.p., n.d. Web. 09May 2013.• "Diagrams - The Excretory System." The Excretory System. N.p., n.d. Web. 14May 2013.• "The Excretory System." ThinkQuest. Oracle Foundation, n.d. Web. 14 May 2013.• "National Kidney and Urologic DiseasesInformation Clearinghouse (NKUDIC)." TheKidneys and How They Work Page. N.p., n.d. Web. 14 May 2013.Bibliography