Airways go through about 23 orders of branching (bifurcations) known collectively as what?
The right and left primary bronchi each supply what?
At the split, what primary bronchus is angled more acutely?
What lobe is susceptible to aspiration pneumonia?
How many secondary bronchi are on the right? The left?
Tertiary bronchi split to yield what?
Bronchi are supported by what?
Bronchioles are <1mm in diameter and have no what?
Bronchioles have a relatively large amount of what?
When does bronchoconstriction occur? (2)
What are the last bronchioles without alveoli?
What is the name of bronchioles with alveoli budding from them?
Bronchioles mark the beginning of what?
and they give rise to what?
Alveolar sacs are what?
Alveolar walls are made of what?
Known as what?
"Cobwebbing" the external surface of the alveoli are what?
O2 and CO2 are exchanged through both sets of simple squamous epithelia (alveolar and capillary) as well as the basement membrane between the 2. This structure is collectively known as what?
The thinness of the respiratory membrane facilitates what?
Interspersed among the type 1 alveolar cells are what?
Type 2 alveolar cells function primarily in what?
Alveolar macrophages (dust cells) definition:
Alveoli are also covered by a network of what?
What does the parietal pleura cover? (3)
At the hilum, the parietal pleura is continuous with what?
What does the visceral pleura cover?
The pleurae produce what?
Which fills the slit-like what?
What does pleural fluid do? (2)
What is the 2 basic mechanisms of breathing?
When does air movement occur?
What are the 3 pressure vital for lung function?
Atmospheric pressure definition:
What is it at sea level?
Intrapulmonary pressure definition:
Intrapleural pressure is always about how much less then ____ pressure.
Thus it is a ____ pressure