Lesson Plan

• Identify cartilage, ciliated epithelium, goblet cells, alveolar squamous epithelium, smooth muscle and capillaries in light‑ and electron‑microscope images.
• Explain the functional contribution of each structure to pulmonary gas exchange.
• Compare photomicrograph and electron‑micrograph features to differentiate the six structures.
• Apply correct labeling conventions when annotating slide diagrams.

• Projector and screen
• Digital photomicrographs & electron micrographs of the respiratory structures
• Printed worksheet with unlabeled slide outlines
• Whiteboard and markers
• Student laptops or tablets (optional for interactive labeling)

Begin with a striking image of a bronchiole cross‑section to spark curiosity about the hidden architecture of the airway. Recall students’ prior knowledge of basic epithelial types and the purpose of mucus. State that by the end of the lesson they will be able to correctly recognise and label six key structures in both light and electron micrographs.

1. Do‑Now (5’) – Students label a simple diagram of tracheal cartilage from memory.
2. Mini‑lecture (10’) – Overview of the six structures and their functional roles, using annotated photomicrographs.
3. Guided Practice (15’) – Small groups examine a set of mixed light‑ and electron‑micrographs; they record distinguishing features on the worksheet.
4. Whole‑class discussion (10’) – Groups share observations; teacher highlights common pitfalls and reinforces labeling conventions.
5. Independent Labelling Activity (10’) – Students individually label a new composite slide image, applying the criteria discussed.
6. Formative Check (5’) – Quick exit quiz (digital or paper) with three image‑identification questions.

Summarise how each structure contributes to efficient gas exchange and how their microscopic signatures help us identify them. Collect the exit quiz as an immediate retrieval check and assign homework: students must create a one‑page annotated diagram combining all six structures, citing at least one photomicrograph and one electron micrograph source.