Lesson Plan

• Describe the external coverings and surface markings of the mammalian heart.
• Identify the four chambers, associated valves, and the direction of blood flow.
• Explain the internal septa and their role in separating chambers.
• Summarise the coronary circulation and its relevance to myocardial perfusion.
• Compare wall thickness of the chambers and relate it to functional pressure differences.

• Projector or interactive whiteboard
• High‑resolution diagram of the external heart view
• 3‑D heart model (or printable model)
• Worksheet with labeling and short‑answer questions
• Coloured markers or stickers for labeling
• Quiz cards for exit ticket

Begin with a striking image of a beating heart to capture interest, then ask students what they already know about the heart’s outer appearance. Briefly outline today’s success criteria: students will be able to label external features, name internal chambers and valves, and explain coronary blood supply.

1. Do‑now (5') – Students label a blank external‑view diagram from memory.
2. Mini‑lecture (10') – Teacher presents pericardium, epicardium, surface markings and major vessels using slides.
3. Guided inquiry (10') – Small groups explore the 3‑D model, identify anterior/posterior surfaces and attached vessels; record observations.
4. Internal structure discussion (15') – Interactive presentation on chambers, valves, septa, and coronary circulation; students complete a fill‑in table.
5. Check for understanding (5') – Quick Kahoot quiz on valve leaflet numbers and blood‑flow direction.
6. Summary activity (5') – Students create a one‑page concept map linking external and internal features.

Recap the key external and internal structures, emphasizing how they work together to maintain unidirectional flow. Students complete an exit‑ticket: name one external feature and one internal structure and explain its function. Assign homework to draft a short paragraph comparing wall thickness of the left and right ventricles.