What is the anatomical dead space volume in an average healthy adult respiratory system?
Answer and explanation
Correct answer: D. Approximately 150 milliliters
- Step 1: Anatomical dead space is the volume of conducting airways (nose, pharynx, trachea, bronchi) that does not participate in gas exchange. Step 2. In an average adult, this volume is approximately 150 mL (roughly 2 mL per kg body weight). Answer: Approximately 150 milliliters. Why not the others: 500 mL is normal tidal volume; 50 mL is infant dead space; 1200 mL is residual volume of the lungs.
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