The Bonchial Tree is a branching system of air tubes in each lung, extending from the ....
primary bronchus to about 65,000 terminal bronchioles
What are the 2 Main (primary) Bronchi?
The first branches of the trachea going left and right into the lungs.
Each Main (primary) Bronchi arises from the ...
trachea at the level of the angle of the sternum
The Main Bonchi are supported, like the Trachea, by ...
C-shaped hyaline cartilage rings
Where does each Main Bonchi enter the lung?
at the Hilum of each lung
The right Main Bronchi is a 2-3 cm branch arising from the ...
fork of the trachea
The right Main Bronchus is slightly wider and more...
vertical than the left
Aspirated (inhaled) foreign objects tend to ...
1. get lodged in the right bronchus more often than the left
2. because the right bronchus is vertical
The left Main Bronchus is how long?
5 cm long
What is the physical structure of the left Main
slightly narrower and more hoizontal that the right
Upon entering the hilum, the Main bronchus branches into one _____ for EACH pulmonary lobe.
The Lobar (secondary) bronchus is supported by ...
crescent shaped cartilage plates
How many Lobar(secondary) Bronchu are in the RIGHT lung?
*** Right lung has 3 lobes
How many Lobar (secondary) Bronchu are in the LEFT lung?
*** Left lung has 2 lobes
The right lung's lobes are ...
The left lung's lobes are...
Each Lobar bronchus branches into ...
segmental (tertiary) bronchi
How many Segmental (teritary) bronchi are in the right lung?
How many in the left lung?
10 on the right lung & 8 on the left lung
The portion of the lung supplied by each Segmental bronchus is called a ...
The Bronchopulmonary Segment is a functionally ...
independent unit of the lung tissue
ALL bronchi are lined with ...
ciliated pseudostraified columnar epithelium
The Lamina Propria has an abundance of mucous glands and lymphocyte nodules called ...
What is its function?
1. bronchus-associated lymphoid tissue (BALT)
2. its positioned to intercept inhaled pathogens
ALL divisions of the Bronchial tree have a large amount of ...
What is its function?
1. Elastic connective tissue
2. contributes to the recoil that expels air from lungs
What well-developed layer of smooth muscle,con-
tracts or relaxes to constrict or dilate the airway, and is responsible for REGULATING AIR-FLOW?
Branches of the Pulmonary artery closely follow the bronchial tree on their way to the ...
The bronchial tree itself is serviced by the ______,
which arises from the ______.
1. bronchial artery
Bronchioles are continuations of the airway that lack ...
The portion of the lung ventilated by one bronchiole is called a ...
What is the structure of Bronchioles?
1. ciliated cuboidal epithelium
2. well-developed layer of smooth muscle
Each bronchiole divides into 50 to 80 .....
What are they?
1. terminal bronchioles
2. the final branches of the conducting division
The Terminal Bronchioles have no ...
mucous glands or goblet cells
The Terminal Bronchioles have cilia that move mucus draining into them back by the ...
Each Terminal Bronchiole gives off ...
2 or more smaller respiratory bronchioles, which have alveoli
budding from their walls
The Respiratory Bronchioles are considered the beginning of the ...
Why is it considered the beginning?
1. respiratory division
2. because alveoli participate in gas exchange
Each Respiratory Bronchiole divides into 2 to 10
elongated, thin-walled passages called ...
The Alveolar ducts end in the ...
Describe Alveolar Sacs.
1. grape-like clusters of alveoli, arrayed around a central space
called the ATRIUM