What is the functional significance of the decreased amount of cartilage and the increased amount of smooth muscle in the lower respiratory passageways?
Why is breathing through the nasal cavity more desirable than breathing through the mouth?
How would you justify the statement The bronchioles are to the respiratory system what the arterioles are to the cardiovascular system??
Individuals who are anemic generally do not exhibit an increase in respiratory rate or tidal volume, even though their blood is not carrying enough oxygen. Why?
You spend a winter night at a friends house. Your friends home is quite old, and the hot-air furnace lacks a humidifier. When you wake up in the morning, you have a fair amount of nasal congestion and decide you might be coming down with a cold. After you take a steamy shower and drink some juice for breakfast, the nasal congestion disappears. Explain.
