NB:Thismaynotbeaword-for-wordtranscript.
WhyIsPneumoniaSoDangerous?
EveGausandVanessaRuiz
Everytimeyoubreathein,airtravelsdownthetrachea,throughaseriesofchannelscalledbronchi,andfinallyreacheslittleclustersofairsacscalledalveoli.Therearesomemillionalveoliinthelungs,addinguptoasurfaceareaofroughly75squaremeters–thesizeofatenniscourt.Thesetinysacs,onlyonecellthick,facilitateacrucialexchange:allowingoxygenfromtheairwebreatheintothebloodstreamandclearingoutcarbondioxide.Pneumoniawreakshavoconthisexchange.Pneumoniaisaninfectionofthealveolithatcausesthemtofillwithfluid.
Therearemanydifferentkindsofpathogensthatcancausepneumonia.Themost