Trachea to Bronchioles Flashcards
Describe the superior and inferior borders of the trachea
extends from the larynx to T5 posteriorly sternomanubrial junction anteriorly and then branches to L and R primary bronchi
What are the 4 layers, from exterior to lumen , of the trachea
- Adventitia
- Hyaline cartilage
- Submucosa
- Mucosa
Describe the general shape of the hyaline cartilage of the trachea
C shaped with its opening to the posterior
What separates the trachea from the esophagus
a fibromuscular membrane that contains the trachealis muscle and elastic connective tissue
What layer of tissue of the trachea contains the seromucous glands on their ducts
submucosa
What type of cells line the trachea lumen
ciliated pseudostratified columnar
Which primary (main) bronchus is shorter, wider and more vertical and why is this important
The right main bronchus
Important for:
- intubation, tube may go to far and enter this bronchus which only ventilates the R lung
- aspiration= food material enters R lung > L lung
What is name for the point where the trachea divides into the L and R primary (main) bronchus
carina
What type of cells line the bronchial lumen
ciliated pseudostratified columnar
How many secondary (lobar) bronchus are there
5 total
3 R lung
2 L Lung
How many tertiary (segmental) bronchus are there
20 total
10 R lung
10 L lung
Describe air flow from the trachea to the alveoli
trachea->primary (main) bronchus->secondary (lobar) bronchus-> tertiary (segmental bronchus)->bronchi become smaller and smaller->->->Lobular bronchioles->terminal bronchioles->respiratory bronchioles->alveolar duct->alveolar sacs-> alveoli
How can you identify the transition from bronchus to bronchioles
the lumen ~1 mm and there are no cartilage in the airway walls
What is the last part of the conducting zone
The terminal bronchioles
What is the first part of the respiration zone
The respiratory bronchioles
