Question 6
Assume that the flow at the level of the trachea is 500 milliliter per second, and that tracheal diameter is 2 cm.
What is the gas speed in the trachea?- Now look at the bottom illustration. The vertical
axis shows how surface area increases from the trachea to the
smaller airways.
- Estimate gas speed at the 10th generation.
Also estimate gas speed at the alveolar level, say at generation 20. - The top figure illustrates the deposition pattern
of particles in the airways as a function of particle diameter.
Pollen are larger than 10 µm, mostly between 20-50 µm.
How far do they penetrate into the airways, where in the airway do they impact? - Assume that a particle has a diameter of 10
µm: how much more mass does it bring to the airway than
a 1 µm particle?