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Bronchopulmonary segmental anatomy describes the division of the lungs into segments based on the tertiary or segmental bronchi. Gross anatomy. The trachea divides at the carina forming the left and right main stem bronchi which enter the lung substance to divide further.
The segmental bronchi divide into many smaller bronchioles that divide into terminal bronchioles, and then into respiratory bronchioles, which divide into 2 to 11 alveolar ducts. Each alveolar duct has 5 or 6 associated alveolar sacs. The alveolus is the basic anatomic unit of gas exchange.
The bronchi are the passageways that connect your windpipe to your lungs. You have two main bronchi in your right and left lungs that divide and branch off into smaller segments, like tree branches. At the end of your bronchi, the alveoli exchange oxygen and carbon dioxide.
The right main bronchus subdivides into three lobar bronchi and the left main bronchus divides into two. The lobar bronchi divide into tertiary bronchi, also known as segmentalinic bronchi, each of which supplies a bronchopulmonary segment.
Pulmonary segments are a functionally independent unit of the lung, supplied by their own segmental bronchus and pulmonary artery and with their own venous and lymphatic drainage. This allows for loss of a segment, without affecting the adjacent segments.
While the functional unit is the capillary-alveoli interface, the lung is divided into segments based on the arborization of the bronchi. The bronchopulmonary segments are the largest functional divisions of the anatomical lobes; each receiving their own air and blood supply.
The bronchi contribute to the functional segmentation of the lungs, dividing each lung into bronchopulmonary segments that can operate somewhat independently. Bronchopulmonary Segments: Each tertiary (segmental) bronchus supplies air to a specific bronchopulmonary segment, which is a distinct, functionally independent unit of the lung. This ...
At the level of the sternal angle, the trachea bifurcates into the right and left main bronchi. They undergo further branching to produce the secondary bronchi. Each secondary bronchi supplies a lobe of the lung, and gives rise to several segmental bronchi.
Each segmental bronchi supply a bronchopulmonary segment, which are the largest subdivisions of the lobe. There are ten bronchopulmonary segments in the right lung and eight through ten bronchopulmonary segments in the left lung, depending on the segment combinations.
Definition. The two main bronchi (right an left) give 5 lobar bronchi (for the 5 pulmonary lobes) that thent divide into 20 segmental bronchi (for the 20 segments of the lung):