1. The Excretory System!
Functions of the system Facts about this system
Excretory system provides way Only 40% of people smell odor
for various wastes to be removed of urine
from body Excretes about 1 to 1.5 liters of
urine each day
Organs or parts of the system Approximately 1% of human
Lungs- get rid of wastes, sweat is composed of salt an
carbon dioxide and water vapor urea
Kidneys- main organ-contains Most humans could survive
microscopic chemical filtration with only 1/3 of one kidney
factories called nephrons Kidney receives and filters
Liver- removes excess amino almost 1 liter of blood per
acids minute
Skin-has two main layers Urinary bladder can store up
(Epidermis and Dermis) 470 milliliters of urine before
releasing it
Perspiration gets rid of body
Why we need the system? wastes
Removes wastes such as excess
water and salts, carbon dioxide, How it works
and urea (a nitrogen waste) Waste gases are carried by
blood traveling through veins
How this system works with to lungs
two other systems •Dead cells and sweat are removed
Digestive system is a pathway from body through skin
for food and water to enter the •Kidneys filter the wastes from
body blood (forms urine)
Respiratory system enables •Urine goes into ureters ( carry
oxygen to enter and carbon dioxide waste to urinary bladder)
and water vapor to leave body •Bladder stores urine until
muscular contractions force urine
Problem/diseases that can occur in out of the body through urethra
this system What systems wouldn't function
Kidney/Urologic Infections without this system:
Cystitis •Digestive system- pathway for
Urethritis food and water (without excretory
Bed wetting system, body would be filled with
Kidney stones waste = explosion)
Pyelonephritis • Respiratory system- allows
Nephritis oxygen into body and (the waste)
carbon dioxide out