Practise airway and alveolar anatomy, ventilation and gas diffusion using slides and plan diagrams, then apply tissue-function and smoking-disease evidence to lung function.
The Weibel Lung model was developed after an extensive study of the gas exchange system. The model includes detailed measurements of airway diameters (lumen diameters of the airways). In the model, different parts of the gas exchange system are identified with a generation number, as outlined in Fig. 6.1.
Fig. 6.1
The Weibel Lung model describes how each airway divides into two.
Name the airways in generation 1, labelled X in Fig. 6.1, that branch from generation 0.
The airways are well supplied with blood. However, the airways from generation 0 to generation 16, shown in Fig. 6.1, are not able to carry out gas exchange.
Suggest why the airways from generation 0 to generation 16 are not able to carry out gas exchange.
Which structure of the gas exchange system always contains cartilage?
alveoli
bronchiole
capillary
bronchus
The photomicrograph shows a section through part of the human gas exchange system.
Which structure is shown?
alveolus
bronchiole
bronchus
trachea
Which flow diagram correctly describes the effect of tar entering the lungs?