Excretory System Notes.pdf
Excretory System Notes.pdf
Excretory System Notes.pdf
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<strong>Excretory</strong> <strong>System</strong> <strong>Notes</strong><br />
Why do we have an <strong>Excretory</strong> <strong>System</strong>?<br />
* The excretory system gets rid of the waste created in our bodies<br />
* Controls the amount of water in our blood<br />
-What puts extra water in our blood?<br />
Organs of the <strong>Excretory</strong> <strong>System</strong><br />
Renal Artery<br />
Carry blood away from the heart and to the kidney<br />
Kidneys<br />
Every 5 minutes all of the blood goes thru the kidneys. The kidneys act as filters to<br />
clean waste from the blood<br />
Ureters<br />
Waste leaves the kidneys and travels down the ureters<br />
Renal Vein<br />
Clean blood leaves the kidneys and returns to the heart<br />
Bladder<br />
Ureters carry waste in the form of urine to the bladder. The bladder is a hollow<br />
muscle that can hold ~1/2 liter of urine<br />
Urethra<br />
Hollow tube that carries urine out of the body<br />
Hypothalamus (in the brain)<br />
Tells the kidney how much water to excrete and how much water should go<br />
back into the blood<br />
Hypothalamus
Other Organ <strong>System</strong>s that help with Excretion:<br />
Integumentary <strong>System</strong><br />
* Removes H20, salts and urea when you sweat<br />
* ~ 20 ounces a day<br />
Respiratory <strong>System</strong><br />
* Removes CO2 and H2O from cellular respiration<br />
Digestive <strong>System</strong><br />
* Gets rid of undigested food in the body<br />
* Liver detoxifies waste
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