Flashcards in Tracheobronchial Tree Deck (19):

1

## Where does the trachea begin?

### Lower border of cricoid cartilage (C6)

2

## The trachea is a rigid fibrocartilage tube lined by what?

### Pseudo-stratified ciliated columnar epithelium

3

## The trachea is held open by what?

### 15-20 U shaped rings

4

## What is the size of the trachea?

###
5 inches long

1 inch in diameter

5

## Each ring is incomplete where?

### Posteriorly linked by trachealis muscle

6

## Where does the trachea end?

### Sternal angle T4/5 by bifurcating into the R and L bronchi

7

## There is a v-shaped cartilage that marks the bifurcation of the trachea called what?

### Carina

8

## What lies behind the trachea?

### Esophagus

9

## The 2nd to 4th tracheal rings are crossed anteriorly by what?

### Isthmus of thyroid gland

10

## How is the R bronchus different from L?

###
Shorter

Wider

More vertical

11

## The L bronchus is what compared to R?

###
Longer

Narrower

More horizontal

12

## Aspirated foreign bodies are more likely to go into where?

### Middle lobe of R primary bronchus

13

## The R main bronchus divides into what?

### 3 secondary bronchi

14

## The L main bronchus divides into what?

### 2 secondary bronchi

15

## Each lobar bronchus divides within each lobe into what?

### Segmental bronchi

16

## Each segmental bronchus feeds a what?

### Bronchopulmonary Segment

17

## The segmental bronchus continues to subdivide until it reaches what?

### Terminal bronchiole

18

## From the terminal bronchioles they lead to what?

### Respiratory bronchioles

19