The respiratory system allows us to breathe by inhaling oxygen and exhaling carbon dioxide. Air enters through the larynx and travels through the trachea into the bronchi and lungs. The lungs take in oxygen and release carbon dioxide through alveoli. Other key parts include the diaphragm, which helps expand the lungs, and ribs, which protect the chest cavity and help with breathing.

1. The Respiratory System By: Joshua Simangan 8-73

2. The Respiratory System The system that allows us to breathe You inhale oxygen and exhale CO2 Air goes through larynx, then trachea Next into two smaller tubes called the bronchi Then into the lungs

3. Trachea tube-like shape also called the “windpipe” passage leading from the larynx to the lungs

4. Larynx the voice box that contains vocal cords where air is breathed in and out creates voice sounds

5. Lungs the organ that makes you breathe takes in oxygen and releases CO2 (carbon dioxide) contains alveoli

6. Diaphragm strong wall made out of muscles extends across the bottom of the ribcage also referred to thoracic diaphragm

7. Bronchioles smallest subdivisions of the bronchi end of the bronchioles is the alveoli walls consist ciliated cuboidal epithelium

8. Alveoli very small air sacs the destination of air breathed in final branchings of the respiratory tree

9. Ribs the bones that support and protect the chest cavity helps the lungs to expand and contract also known as the thoracic cage

10. Bibliography Websites: http://www.lung.ca/children/grades7_12/respiratory/respiratory_system.html http://www.wikipedia.org/ http://42explore.com/respsyst.htm http://kidshealth.org/kid/htbw/lungs.html http://www.courseweb.uottawa.ca/medicine-histology/english/Respiratory/default.htm

11. Bibliography Photos: http://www.saburchill.com/chapters/chap0019.html http://www.umm.edu/imagepages/19380.htm http://www.odec.ca/projects/2005/thog5n0/public_html/whatarelungs.html http://medical-dictionary.thefreedictionary.com/trachea http://www.biologycorner.com/anatomy/respiratory/resp_images.html http://www.uvm.edu/~inquiryb/webquest/sp09/cnclark/componentsofrespiratory.html http://www.daviddarling.info/encyclopedia/A/alveolus.html http://www.lung.ca/children/grades7_12/respiratory/respiratory_system.html#esophagus