o Kraakbeenringen houden de trachea en bronchi open.
o Bronchioli eindigen in alveoli; glad spierweefsel zorgt voor regulatie van luchtstroom.
LONGDIFFUSIE
• Uitwisseling van zuurstof en kooldioxide vindt plaats in de alveoli door diffusie.
o Optimale diffusie vereist een groot oppervlak, een dunne wand en een
concentratieverschil.
o Bij problemen (bijv. gezwollen alveoli of longemfyseem) helpt extra zuurstof.
LONGPERFUSIE (DOORBLOEDING)
• Zuurstofarm bloed stroomt naar de longen via de longslagader en wordt in de longcapillairen van
zuurstof voorzien.
• Zuurstof wordt gebonden aan hemoglobine en naar weefsels vervoerd.
o Zuurstofsaturatie is meestal 95-100%.
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