Lesson: Animals Including Humans
Year: 6 | Subject: Science | Time Allocation: 100%
Class/Set: ____________ Date/Term: ____________
LO (WALT): To describe the functions of the heart, blood vessels, and blood within the human circulatory system.
Success Criteria (WILF):
- I can identify and label the four main chambers of the heart.
- I can explain the difference between oxygenated and deoxygenated blood.
- I can describe the specific roles of arteries, veins, and capillaries.
1. Starter (15%)
- Activity: The 'Pulse Point' Investigation.
- Demonstrate: Show students how to find their radial pulse (wrist) or carotid pulse (neck).
- Action: Students count their heart rate for 60 seconds at rest.
- Discuss: Ask students to predict how a 'professional athlete' vs an 'inactive person' might differ in heart rate and why.
- Retrieve: Quickly recap the major organs of the body learned in previous years (lungs, brain, stomach) and ask which organ 'drives' the movement of blood.
2. Main Activity (70%)
Teacher Input:
- Display: Show a high-quality cross-section diagram of the human heart, identifying the right/left atria and right/left ventricles.
- Explain: Use the 'Double Pump' analogy. Clarify that the right side pumps deoxygenated blood to the lungs, while the left side pumps oxygenated blood to the rest of the body.
- Define: Introduce Tier 3 vocabulary: Arteries (away from heart), Veins (into the heart), and Capillaries (tiny vessels for exchange).
- Model: Draw a simplified flow chart on the board showing the journey of a red blood cell: Heart → Lungs → Heart → Body.
- Check: Use mini-whiteboards. Ask: "Which blood vessel carries blood away from the heart?" (A for Artery/Away).
Student Task:
- Task A (Labelling): Label: On the provided diagram, students must identify the four chambers and the pulmonary artery/vein.
- Task B (The Journey): Describe: Write a short 'first-person' narrative from the perspective of a red blood cell. Students must use the terms 'oxygenated', 'deoxygenated', 'lungs', and 'pumping'.
- Task C (Comparison): Complete: Fill in a table comparing the structures of arteries (thick walls, high pressure) and veins (thinner walls, valves).
- Support: Provide a 'Word Bank' for Task B containing the key Tier 3 terms.
- Extend: Challenge 'Greater Depth' (GDS) students to explain why the left ventricle wall is thicker than the right ventricle wall.
3. Plenary (15%)
- Reflect: Conduct a 'True or False' finger-vote. (e.g., "Veins have valves to stop blood flowing backwards" - True).
- Consolidate: Revisit the Success Criteria. Students tick off which 'I can' statements they feel confident with today.
- Question: If the heart is a muscle, how can we make it stronger? (Link to diet and exercise for the next lesson).
4. Resources
- Heart cross-section diagrams.
- Red and blue colouring pencils (for oxygenated/deoxygenated distinction).
- Mini-whiteboards and pens.
- Tier 3 Vocabulary mats.
⚠ TEACHER’S GUIDANCE
💡 Pedagogical Pulse
- Delivery: Conduct the 'Pulse Point' starter as a focused carpet session to ensure all students can physically locate their pulse before starting the theory.
- Misconception Alert: Ensure students understand that deoxygenated blood is not actually blue (it is dark red); the blue/red colour coding on diagrams is a scientific convention for clarity.
- Differentiation: For Task B, provide a scaffolded 'cloze' passage for students with SEND, allowing them to focus on the conceptual flow rather than the cognitive load of writing.
✅ Answer Key & Solutions
- Task A (Labelling) Answer:
- Top Left (as viewed): Right Atrium.
- Bottom Left (as viewed): Right Venticle.
- Top Right (as viewed): Left Atrium.
- Bottom Right (as viewed): Left Ventricle.
- Main vessel to lungs: Pulmonary Artery.
- Task B (The Journey) Answer: Model narratives should follow the sequence: Heart (Right) → Lungs (pick up oxygen) → Heart (Left) → Body (deliver oxygen/nutrients) → Heart (Right).
- Task C (Comparison) Answer:
- Artery: Thick muscular walls; Narrow lumen; High pressure; No valves.
- Vein: Thinner walls; Wide lumen; Low pressure; Contains valves.
- GDS Extension Answer: The left ventricle wall is thicker because it must pump blood at high pressure to the entire body, whereas the right ventricle only pumps blood a short distance to the lungs.