1. By Erin Murphy and
Jeffrey Edgecomb

2. • Gets rid of waste
• Eliminates useless byproducts excreted from
cells
• Destroys harmful chemical buildups
• Maintains a steady and balanced chemical
concentration
Function 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 cool
Lungs:
• Diffuse gaseous wastes, such as carbon dioxide from the bloodstream as a
normal part of respiration
• Maintain life supporting levels of carbon dioxide and oxygen
Kidneys:
• Blood passes through the kidneys to deposit used and unwanted
water, minerals, and a nitrogen-rich molecule called urea
• Filters waste from the blood and produces urine
Liver:
• Regulates glycogen storage, plasma protein synthesis, and drug
detoxification
• Secretes bile
• Converts toxic ammonia into urea
Major Organs and Their Functions

4. Urinary Bladder:
• Stores urine
Bile:
• Substance produced by the liver used to break down fats, ethanol and
acidic wastes
Urethra:
• Carries the urine from the bladder out the body
Eccrine:
• Eccrine glands secrete mostly salt and water used to control
temperature
Large Intestine (Colon):
• Removes solid waste from the body, and collects water from the waste
to be reused
Major Organs and Their
Functions Continued

5. • Processes about 200 quarts of
blood and produces about 2
quarts of waste per day
• Produces urine which is
transported to the bladder
through ureters
• If the kidneys didn’t remove
waste from the blood it would
build up and damage the body
• Kidney contains tiny capillaries
called nephrons that remove
waste from the blood
• Nephrons also measure certain
chemicals and release the right
amount back into the blood
Kidney

6. Kidney Stones
Kidney stones are hard masses that form in the urinary
tract from crystals that have separated from the urine.
The exact cause of kidney stones is unknown, but those
with certain genetic disorders, kidney disorders and
reoccurring urinary tract infections are more likely to
develop kidney stones.

7. Urethritis is an inflammation of the urethra caused by a
bacterial or viral infection. Symptoms of urethritis vary
between sexes. A symptom in men can be seen as
blood in the urine or semen or even a discharge
containing puss. In women, abdominal pain, pain
during urination and fever may occur.
Urethritis

8. Circulatory:
Blood that circulates through the body passes through
one of the two kidneys. Urea, uric acid, and water are
removed from the blood and most of the water is put
back into the system
Endocrine:
Monitors levels of compounds and fluids
Kidney function must be constantly altered to provide
the best internal environment for your cells
If too much water is present, hormones are released that
allow for more urine production. If the body is
dehydrated, less urine will be produced
Adrenal gland position on the top of each kidney.
Adrenals release adrenaline into your body
How it Works with Other Systems

9. Major Organs Diagram

10. The liver converts toxic ammonia to urea and releases it into
the blood.
Blood circulates through the kidney and the kidney collects
waste from the blood using nephrons.
Nephrons produce urine with the excess waste and process
necessary chemicals back into the blood.
Urine is carried to the urinary bladder through ureters and exits
through the urethra
Bile helps breaks down solid waste and the large intestine or
colon removes the solid waste from the body and reuses excess
water
Waste 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 through
the bladder and out through the urethra in an average person’s
lifetime
5 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." Biology4Kids.com: Animal Systems:
Excretory System. N.p., n.d. Web. 09 May 2013.
• "Common Excretory System Diseases." LIVESTRONG.COM. N.p., n.d. Web. 09
May 2013.
• "Diagrams - The Excretory System." The Excretory System. N.p., n.d. Web. 14
May 2013.
• "The Excretory System." ThinkQuest. Oracle Foundation, n.d. Web. 14 May 2013.
• "National Kidney and Urologic DiseasesInformation Clearinghouse (NKUDIC)." The
Kidneys and How They Work Page. N.p., n.d. Web. 14 May 2013.
Bibliography