Excretory+System+-+2nd+Period

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**__The Excretory System's Functions__ ** **Kidneys:** Help clean out out blood **Bladder:** Fills up with urine and lets it out when needed **Ureter:** A narrow duct that takes urine from the kidneys to your bladder **Urethra:** Canal that empties your urine from your bladder **Rectum:** Removes solid wastes from your body __**The Excretory System's Roles **__ The Excretory System is what makes you go to the bathroom. The urine in your body passes through the kidneys and into your bladder. Your bladder fills up with a little bit of urine about every 10 to 15 seconds. As your bladder fills up and gets full you get a signal from your nerves to your brain telling you that you need to go to the bathroom. Also, your excretory system removes toxic wastes like urea. Urea is poison and is mixed with extra salts and water your body doesn't need to make urine. Without the excretory system you would die because the toxins and extra wastes would build up in your body. **Citation Page**  **Photograph. Web. 7 Dec. 2011.  **  **Photograph. Web. 7 Dec. 2011. ** page=1&resultsPerPage=15&subjectId=0&collectionId=0&keyword=kidney>. **

**Photograph. Web. 7 Dec. 2011. .**

<span style="font-family: 'Comic Sans MS',cursive;">**<span style="color: #000000; font-family: 'Comic Sans MS',cursive;">Photograph. Web. 7 Dec. 2011 <http:quest.eb.com/search?page=1&resultsPerPage=15&subjectId=0&collectionId=0&keyword=stomach>. **

<span style="font-family: 'Comic Sans MS',cursive;">**<span style="color: #000000; font-family: 'Comic Sans MS',cursive;">Web. 7 Dec. 2011 <http://www.health-lesson-plans-teacher.com/digestivesystem.html>. **

<span style="font-family: 'Comic Sans MS',cursive;">**Photograph. Web. 8 Dec. 2011. <http://www.innerbody.com/image/digeov.html>.**

<span style="font-family: 'Comic Sans MS',cursive;">**<span style="color: #000000; font-family: 'Comic Sans MS',cursive;">Photograph. Web. 8 Dec. 2011. <http://www.imcpl.org/kids/guides/health/excretorysystem.html>. **

<span style="font-family: 'Comic Sans MS',cursive;">**<span style="color: #000000; font-family: 'Comic Sans MS',cursive;">Photograph. Web. 8 Dec. 2011. <http://quest.eb.com/search?page=1&resultsPerPage=15&subjectId=0&collectionId=0&keyword=excretory+system>. **

<span style="font-family: 'Comic Sans MS',cursive;">**<span style="color: #000000; font-family: 'Comic Sans MS',cursive;">Photograph. Web. 8 Dec. 2011. <http://quest.eb.com/search?keyword=colon&collectionId=0&subjectId=0&resultsPerPage=15&page=11>. **

<span style="font-family: 'Comic Sans MS',cursive;">**<span style="color: #000000; font-family: 'Comic Sans MS',cursive;">Photograph. Web. 8 Dec. 2011. <http://quest.eb.com/search?page=1&resultsPerPage=15&subjectId=0&collectionId=0&keyword=human+gallbladder>. **

<span style="font-family: 'Comic Sans MS',cursive;">**<span style="color: #000000; font-family: 'Comic Sans MS',cursive;">Photograph. Web. 8 Dec. 2011. <http://quest.eb.com/search?page=1&resultsPerPage=15&subjectId=0&collectionId=0&keyword=liver>. **

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