Excretory System
By: Manuel Sieiro
¿What is the Excretory System?
Is a biological system that:
 Removes excess.
 Helps maintain internal chemical homeostasis.
 Prevent damage to the body.
The dual function of excretory systems is:
 The elimination of the waste
 To drain the body of used and broken down components in a
liquid and gaseous state.
Excretory System
Main Organs
1) Urinary System:
 Kidneys
 Ureter
 Bladder
 Urethra
2)Lungs
3)Liver
4)Large Intestine
5)Skin
Urinary System
Kidney
 Works on the removal of the
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nitrogenous wastes from the
blood, such as: urea, salts, and
excess of water. Coming out
in the form of urine.
It's possible to lose as much as
90% of kidney function
without experiencing any
symptoms or problems.
2 of them.
Disease: Kidney Disease
Medical Trend: Nephritis
and Nephrosis.
Ureter
 Carries urine from the
kidney to the urinary
bladder.
 2 of them as there are 2
kidneys.
 Disease: Ureteral Diseases.
 Medical Trend:
Vesicoureteral Reflux
Bladder
 It’s the one responsible for
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collecting any urine that the
kidneys excrete.
The urine is stored here before
urination occurs.
Can hold up enough fluids to
fill up two standard cans of
soda.
Disease: Urinary Bladder
Disease.
Medical Trend: Bladder
Cancer.
Urethra
 Connects a person’s urinary
bladder to their genitals so
that urine can be removed
from the body.
 Disease: Urethral Diseases
 Medical Trend: Urethritis
and Urethral Stricture.
Lungs
 Cellular respiration.
 Gets all the carbon dioxide
out of our bodies.
 Disease: Lung Diseases.
 Medical Trend: Asthma.
Liver
 Bile
 Detoxification and
breakdown of chemical,
poisons and other toxins.
 Classification of wastes.
 Disease: Liver Disease.
 Medical Trend: Alcohol
Abuse
Large Intestine
 Transports food particles and
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expels the indigestible parts to
the other end.
Also collects wastes from the
body.
The intestines for a human are
generally 8.5 meters in length.
That’s more than 27 feet if you
could stretch them all out in a
line.
Disease: Large Intestine
Disease.
Medical Trend:
Inflammatory bowel
Skin
 Excretes sweat through
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sweat glands throughout the
body.
Homeostasis.
Temperature regulator.
Your skin will shed up to
40,000 skin cells every
minute in order to replenish
itself.
Disease: Skin Disease.
Medical Trend: Eczema.