Right main bronchus
Encyclopedia
The right main bronchus (or right primary bronchus, or right principal bronchus) is a bronchus
of the respiratory system
. It is wider, shorter, and more vertical in direction than the left
. It is about 2.5 cm long, and enters the right lung
nearly opposite the fifth thoracic vertebra.
The azygos vein
arches over it from behind; and the right pulmonary artery lies at first below and then in front of it.
About 2 cm from its commencement it gives off a branch to the upper lobe of the right lung.
This is termed the eparterial branch of the bronchus, because it arises above the right pulmonary artery
.
The bronchus now passes below the artery, and is known as the hyparterial branch; it divides into two branches for the middle and lower lobes.
If a foreign body in the airway passes through the trachea, it will most likely enter the right main bronchus instead of the left, due to the straighter alignment of the right bronchus to the trachea.
.
Bronchus
A bronchus is a passage of airway in the respiratory tract that conducts air into the lungs. The bronchus branches into smaller tubes, which in turn become bronchioles....
of the respiratory system
Respiratory system
The respiratory system is the anatomical system of an organism that introduces respiratory gases to the interior and performs gas exchange. In humans and other mammals, the anatomical features of the respiratory system include airways, lungs, and the respiratory muscles...
. It is wider, shorter, and more vertical in direction than the left
Left main bronchus
The left main bronchus is smaller in caliber but longer than the right, being nearly 5 cm long...
. It is about 2.5 cm long, and enters the right lung
Right lung
The human right lung is divided into three lobes , superior, middle, and inferior, by two interlobular fissures:-Fissures:...
nearly opposite the fifth thoracic vertebra.
The azygos vein
Azygos vein
The azygos vein is a vein running up the right side of the thoracic vertebral column. It can also provide an alternate path for blood to the right atrium by allowing the blood to flow between the venae cavae when one vena cava is blocked.-Structure:...
arches over it from behind; and the right pulmonary artery lies at first below and then in front of it.
About 2 cm from its commencement it gives off a branch to the upper lobe of the right lung.
This is termed the eparterial branch of the bronchus, because it arises above the right pulmonary artery
Pulmonary artery
The pulmonary arteries carry deoxygenated blood from the heart to the lungs. They are the only arteries that carry deoxygenated blood....
.
The bronchus now passes below the artery, and is known as the hyparterial branch; it divides into two branches for the middle and lower lobes.
If a foreign body in the airway passes through the trachea, it will most likely enter the right main bronchus instead of the left, due to the straighter alignment of the right bronchus to the trachea.
Tracheal Bronchus
In 0.1 to 5% of people there is a right superior lobe bronchus arising from the main stem bronchus prior to the carina. This is known as a tracheal bronchus, and is thought to be due to abnormal embryogenesis. It can have multiple variations and, although usually symptomatic, can be the root cause of pulmonary disease such a recurrent infection. In such case resection is often curative.