The invention relates to an analysis system for analysing an analyte contained in a sample of body fluid. Said system comprises a test element (3) that respectively comprises a housing (15) and an analysis function channel (16) that is surrounded by the housing (15), and an evaluation device (2) comprising a measuring station (6) for measuring a measurement variable characterising the analysis result in the measurement zone (19) of the test element (3), and comprising a preferably rotatable maintaining element for maintaining a test element (3). Said test element (3) comprises an air flow channel (25) having two wider sections (26a, b) and a narrow section (27) that is arranged between said wider sections (26a, b). Said wider sections (26a, b) have a cross-sectional surface that increases compared to the narrow section (27) in the direction away from said narrow section, and a connection channel (24) is arranged in such a manner between the narrow section (27) and the analysis function channel (16) that an air exchange connection is formed, the air flow channel (25) being arranged in such a manner that low pressure produced by means of an air flow flowing through the air flow channel (25) acts upon the analysis function channel (16).