Trachea, bronchi and bronchioles Flashcards
1
Q
Which part of the airway has the smallest cross sectional area?
A
Trachea. This is responsible for most resistance to airflow
2
Q
What prevents the trachea collapsing?
A
The hyaline cartilage rings
3
Q
At what level does the trachea bifurcate?
A
T4
4
Q
Describe some landmarks at T4
A
Sternal angle, trachea bifurcation, aortic arch, second rib articulates with sternum
5
Q
Which main bronchus is wider and shorter?
A
The right. It runs more vertically to enter the right lung hilum
6
Q
Which main bronchus is orientated more horizontally and runs inferior to the aortic arch?
A
The left bronchi
7
Q
How many times does each main bronchi further divide?
A
11
8
Q
How many lobar bronchi does the right lung have?
A
3 (one for each lobe)
9
Q
How many total divisions are at alveoli?
A
24
