Module 7: Respiratory System: Respiratory portion Flashcards
1
Q
respiratory portion is where
A
gaseous exchange occurs
consists of respiratory bronchioles, alveolar ducts, alveolar sacs, alveoli
2
Q
Respiratory bronchioles
A
walls have small number of single alveoli
No goblet cells
Ciliated cuboidal and some non-ciliated cells (Clara cells which produce surfactant)
3
Q
Alveolar ducts, sac, alveoli
A
lined by flattened epithelial cells
rich network of capillaries
4
Q
3 tissue components of alveolar wall
A
Epithelium: Type I and Type II pneumocytes
Connective tissue: fine reticular, collagenous and elastic fibres
Blood vessels
5
Q
Alveolar macrophages/dust cells
A
phagocytes of the alveolar
6
Q
Type I pneumocytes
A
function in gaseous exchange
7
Q
Type II pneumocytes
A
secrete surfactant which reduces surface tension within the alveoli
