The respiratory system is responsible for gas exchange in the body. It takes oxygen from the air we breathe in through the trachea and into the lungs. In the lungs, oxygen passes into the bloodstream in tiny air sacs called alveoli, while carbon dioxide moves from the blood into the alveoli and is breathed out. Key parts include the trachea, larynx, bronchi, lungs, alveoli, diaphragm, and bronchioles which work together to inhale oxygen and exhale carbon dioxide.

1. Respiratory SystemRaelynnLlemit8-14

2. Respiratory SystemBreathing SystemTakes in oxygenBreathes out carbon dioxide

3. TracheaWindpipeLeads passage from the throat to lungsInhales air from Larynx to Bronchi

4. Larynx“Voice Box”Produce soundAir breathed in and out

5. BronchusTwo main branches of the TracheaAir passages beyond the TracheaCarries air to the lungs

6. LungsAir-breathing vertebratesServes carbon dioxide to the atmosphereProvides oxygen to the blood

7. AlveolusTiny air sacs for holding air in the lungsGas exchange takes placeHelp from the Circulatory System

8. DiaphragmMain muscle for breathingExpands reducing amount of air breathed in to breathe outExpands when the air was pulled to the lungs

9. BronchiolesFirst airway branchesCarries air to the AlveolusMain passage way (lungs)

10. Bibliography – PicturesAlveoli - http://www.bing.com/images/search?q=Trachea&view=detail&id=79242F2884EC64B94CF725CAAD5FC9AE07F637EE&first=1&FORM=IDFRIRLarynx - http://www.bing.com/images/search?q=larynx&view=detail&id=E740A4FDCF93F5C47F7C4C06DF3E05AF5B79297E&first=1&FORM=IDFRIRBronchus - http://www.bing.com/images/search?q=bronchus&view=detail&id=72E773E77713BD59D80BB0F1D2A0B8D8209BA829&first=1&FORM=IDFRIR

11. Bibliography - Pictures pt. 2Lungs - http://www.bing.com/images/search?q=lungs&view=detail&id=0B1374E73D1398BA89BF91FD49836BDCAC044DB7&first=1&FORM=IDFRIRAveolus - http://www.wpclipart.com/medical/anatomy/blood/alveolus_diagram.png.htmlDiaphragm - http://www.bing.com/images/search?q=diaphragm&view=detail&id=31A08BA98568790D2B997A2E64223E377761AECB&first=1&FORM=IDFRIR&adlt=strictBronchioles – http://www.google.ca/imgres?imgurl=http://images.rxlist.com/images/featured/detail_bronchioles_normal.jpg&imgrefurl=http://www.rxlist.com/script/main/art.asp%3Farticlekey%3D110255&usg=__0op4ZmMmNaGRkv1U5ZtnkYxND-g=&h=318&w=468&sz=75&hl=en&start=0&zoom=1&tbnid=fWw4ahTVOCFo8M:&tbnh=123&tbnw=181&ei=gmisTaLVBIfq0gHvpO35CA&prev=/images%3Fq%3Dbronchioles%26um%3D1%26hl%3Den%26safe%3Dactive%26sa%3DN%26rls%3Dcom.microsoft:en-ca:IE-SearchBox%26biw%3D1258%26bih%3D883%26tbm%3Disch&um=1&itbs=1&iact=hc&vpx=668&vpy=570&dur=359&hovh=185&hovw=272&tx=158&ty=85&oei=gmisTaLVBIfq0gHvpO35CA&page=1&ndsp=30&ved=1t:429,r:21,s:0

12. Bibliography - Sourceshttp://library.thinkquest.org/5777/resp1.htmhttp://biology.clc.uc.edu/courses/bio105/respirat.htmhttp://www.helium.com/items/811513-how-does-the-respiratory-system-workhttp://lung.ca/children/grades7_12/respiratory/respiratory_system.htmlhttp://kidshealth.org/parent/general/body_basics/lungs.htmlhttp://hes.ucfsd.org/gclaypo/repiratorysys.html#FAQS