Flashcards in 1. Respiratory tree Deck (30):
Respiratory tree - 2 zones
1. Conducting zone
2. respiratory zone
Conducting zones constist of
1. large airways (nose, pharynx, larynx, trachea, bronchi)
2. small airways (small bronvhioles, terminal bronchioles)
Conducting zones - large airways
Conducting zones - small airways (characteristivs)
terminal bronchioles --> large number in paraller --> least airway
Least airway resistant (why)
terminal bronchioles ( LARGE NUMBRT IN PARALLEL)
conducting zones - function
warms, humidifies, and filters air but does not participate in gas exchange --> anatomic dead space
conducting zone -histology
1. cartilage and goblet extent to end of bronchi
2. pseudostratified ciliated columnar cells extend to beginning of terminal bronchioles, then transition to cuboidal cells ( clear mucus and debris (mucociliary elevator))
3. Airway SMCs extend to end of terminal bronchioles and sparse beyond this point
Pseudostratified ciliated columnar cells - function
clear mucus forom lungs (mucociliary elevator)
res[iratory zone - function
it participates in gas exchange
respiratory zone - consist of
lung parenchyma (respiratory bronchioles, alveolar ducts , alveoli)
Lunh parenchyma consist of
respirtatory bronchioles, alveolar ducts, alveoli
respiratory zone - histology
mostly cuboidal cells in respiratory bronchioles, the simple squamous cells up to alveoli
-Cilia terminate in respiratory bronchioles
Alveolar macrophages - functionc
clear derbris and participate in immune response
respiratory tree - area of cilia
terminate in respiratory bronchioles
respiratory bronchioles histology - mostly cells in respiratory bronchioles
Smoorh muscle cells area
extend to end of terminal bronchioles and sparse beyond this point
Pseydostratified ciliated columnar cells
extend to beginning of terminal bronchioles
respiratory tree - pseudostratified ciliated coluoidal cellsmnal cells extend to ... and transiition to
beginning of terminal bronchioles
cartilage extend to
golblet cells extend to
end of bronchi
Which structures make up the large airways of the conducting zone of the respiratory tree? The small airways?
Large airways = nose, pharynx, larynx, trachea, bronchi; small airways = bronchioles, terminal bronchioles
Which part of the conducting zone of the respiratory tree has the least airway resistance?
At the terminal bronchioles. where a large number of them run in parallel
Name the three functions of the conducting zone of the respiratory tree.
The conducting zone warms, humidifies, and filters air
Which zone of the respiratory tree includes the anatomic dead space?
The conducting zone (by definition, dead space does not participate in gas exchange)
Cartilage and goblet cells extend to the end of the respiratory ____ (bronchioles/bronchi).
Conducting zone epithelium is ___ (cuboidal/pseudostratified ciliated columnar) and ___ (cuboidal/simple squamous) in terminal bronchioles.
Pseudostratified ciliated columnar (cilia beat to remove mucus and debris), cuboidal
What type of muscle is found in the walls of the conducting airways, and up to where does it extend?
Smooth muscle; end of terminal bronchioles (beyond that point, it is sparse)
What anatomic area does the respiratory zone encompass, and what is the major function?
The lung parenchyma: respiratory bronchioles, the alveolar ducts, and the alveoli all function in gas exchange
What type of epithelial cells is found in respiratory bronchioles?
Predominantly cuboidal cells