Final answer:
The bleed air system pressure has a specific normal start range that is essential for the correct operation of aircraft systems. Analogous to Mean Arterial Pressure in the human body, the bleed air system must maintain a certain pressure to ensure functionality, much like blood pressure must be maintained for tissue oxygenation.
Step-by-step explanation:
The bleed air system pressure in aircraft typically has a normal start range that is necessary for various systems on the aircraft to function correctly. The concept provided in the question hints at the idea that this range displays a proportional figure derived from a certain range of numbers.
In the provided context, if we consider the range of normal start to be analogous to the range of Mean Arterial Pressure (MAP) mentioned, the formula given (80 + (120 - 80) / 3) calculates a value within the specified MAP range of 70 - 110 mm Hg. As the MAP is crucial for ensuring adequate blood circulation, similarly, the correct bleed air system pressure is critical for proper aircraft operation.
A bleed air system pressure that is too low could result in inefficient operation of aircraft systems, akin to hypoxemia and ischemia in the human body where tissue oxygenation is inadequate when blood pressure drops below 60 mm Hg.