Umoyambulunga (inhlanganisela yamazwi amabili umoya + imbulunga) ubuhalalazi bohowo ebungunge umzulane, futhi bubanjwe umnyondo bendikimba yomzulane. Umzulane ugcina umoyambulunga lapho umnyondo umkhulu futhi izingalokushisa lomoyambulunga liphansi. Umoyambulunga wenkanyezi buyindwawana engaphandle yenkanyezi, ehlanganisa ubuhalalazi obungaphezu kwebanembulunga elingakhanyi; izinkanyezi ezinezingalokushisa eliphansi kungenzeka zinomoyambulunga ongaphandle iqukethe imixube yamachembe.
![Thumb](http://upload.wikimedia.org/wikipedia/commons/thumb/7/7d/Mars_atmosphere.jpg/640px-Mars_atmosphere.jpg)
![Thumb](http://upload.wikimedia.org/wikipedia/commons/thumb/b/be/Top_of_Atmosphere.jpg/640px-Top_of_Atmosphere.jpg)
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