
Bronchial vessels
In order to supply tissues that form the walls of respiratory passageways, bronchial vessels must lie within the wall, making their diameter smaller than the thickness of that wall. 200x

Bronchus
In order to supply tissues that form the walls of respiratory passageways, bronchial vessels must lie within the wall, making their diameter smaller than the thickness of that wall. 200x

Cartilage plates
In order to supply tissues that form the walls of respiratory passageways, bronchial vessels must lie within the wall, making their diameter smaller than the thickness of that wall. 200x

Bronchial vessels
In order to supply tissues that form the walls of respiratory passageways, bronchial vessels must lie within the wall, making their diameter smaller than the thickness of that wall. 200x

Macrophages
In order to supply tissues that form the walls of respiratory passageways, bronchial vessels must lie within the wall, making their diameter smaller than the thickness of that wall. 200x