Why is a free-catch urine sample inappropriate for bacteriol…

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Why is а free-cаtch urine sаmple inapprоpriate fоr bacteriоlogical analysis?

12. THIS ANATOMY OF THE ADULT BODY IS COMMON REASON FOR UPPER AIRWAY OBSTRUCTION...

17. CONCHA IN THE UPPER AIRWAY CAUSES A LAMINANT FLOW.

8. WHAT IS THE PURPOSE OF CONCHA? I. INCREASE VELOCITY FOR TURBULENT FLOW II. INCREASE SURFACE AREA FOR HUMIDITY AND FILTRATION III. DECREASE VELOCITY FOR LAMINANT FLOW IV. DECREASE SURFACE AREA FOR GAS EXCHANGE