bronchi tubes, bronchial walls, alveoli, respiratory membrane

what does 1 bronchi supply

each supplies 1 lung 

what does 2 bronchi supply

each supply each lobe

how many secondary bronchi does left lung have

2 secondary bronchi

how many secondary bronchi does right lung supply

3 secondary bronchi

what does 3 bronchi supply 

each supply bronchopulmonary segment of lobe 

bronchial walls contain progressively less and more _ and _

less cartilage, more smooth muscle and elastic fibers

3 bronchi has more _ than 1 bronchi

more airway constriction control

each 3 bronchi branches into 

bronchials 

what are bronchials are lined by

lined by simple epithelium with no cartilage, only has smooth muscle and elastic fibers

what is bronchodilation

caused by sympathetic NS to reduce air flow resistance

what is bronchoconstriction 

caused by parasympathetic NS to increase airflow constriction 

another word for bronchoconstriction

asthma

what are alveoli

bronchioles become alveoli for gas exchange

what are alveoli lined by 

simple squamous epithelium 

2 alveoli cell types

type 1 (gas exchange) and type 2 (produce surfactant

what does surfactant do

reduce surface tension so alveoli do not collapse

alveoli CT layers have what 

capillaries and elastic fibers, no more smooth muscle 

respiratory distress syndrome

alveoli collapse cause low surfactant

respiratory membrane (3 points)

simple epithelium cells lining alveolus

thin ct layer in b/w

endothelial layer lining capillaries

pneumonia

alveolar walls inflame and become fluid filled, so oxygen can not reach blood stream

pneumothorax 

vacuum b/w 2 layers of pleural sacs is destroyed and air enters 

pleural sacs

fluid filled sacs that protect lungs