Bronchi And Bronchial Tree

Question 1

Trachea bifurcates at

Answer 1

T4

Question 2

Description of last tracheal ring
Forms a ridge called

Answer 2

Wider and larger
Carina

Question 3

Deference bt rt and lt main bronchus

Answer 3

Rt is shorter and wider and more vertical
2.5 cm
Lt is more angled (45°) and is 5 cm long.

Question 4

Rt main bronchus relations

Answer 4

passes under the azygos vein arch and lies above and then behind the right pulmonary artery

Question 5

Lt main bronchus relations

Answer 5

passes under the aortic arch, in front of the oesophagus, thoracic duct and descending aorta, and lies below and then behind the left pulmonary artery

Question 6

Right main bronchus terminates in

Answer 6

three lobar bronchi – upper, middle and lower – that supply the respective lung lobes.

Question 7

Each lobar bronchus then terminates in segmental bronchi as follows:

Answer 7

Upper – apical, anterior and posterior

Middle – lateral and medial

Lower – superior, medial basal, anterior basal, lateral basal and posterior basal

Question 8

Left main bronchus terminates in

Answer 8

two lobar bronchi – upper and lower also supplying the respective lung lobes.

Question 9

corresponding segmental bronchi are:

Answer 9

Upper – apical, anterior, posterior, superior lingual and inferior lingual

Lower – superior, medial basal (small and variable), anterior basal, lateral basal and posterior basal

Question 10

layers of the bronchial wall are

Answer 10

Mucosa
Basement membrane
Submucosa
Muscular layer
Cartilage
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Question 11

The bronchial subdivisions are:

Answer 11

Bronchus
Bronchiolus – cartilage disappears
Respiratory bronchiolus
Alveolar duct
Alveolar sac
Alveolus