Lesson Plan

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Lesson Plan
Grade: Date: 25/02/2026
Subject: Biology
Lesson Topic: state the functions of tissue fluid and describe the formation of tissue fluid in a capillary network
Learning Objective/s:
  • Describe the functions of tissue fluid in the body.
  • Explain how Starling forces drive filtration and reabsorption in capillaries.
  • Illustrate the formation of tissue fluid and its entry into the lymphatic system.
  • Apply the net filtration pressure equation to predict fluid movement.
  • Evaluate the importance of tissue fluid balance for homeostasis.
Materials Needed:
  • Projector and screen for diagram presentation
  • Whiteboard and markers
  • Handout with summary table of Starling forces
  • Interactive worksheet with case scenarios
  • Printed capillary‑network diagrams for group activity
 Introduction:
Imagine a city’s water system delivering nutrients to every house – tissue fluid does the same for our cells. Review the basic structure of a capillary and recall how blood pressure moves fluid. Today you will be able to list what tissue fluid does and trace how it is formed and returned to the circulation.
Lesson Structure:
  1. Do‑now (5'): Quick quiz on blood pressure and hydrostatic vs. oncotic forces.
  2. Mini‑lecture (10'): Explain the five functions of tissue fluid using the projector diagram.
  3. Guided practice (12'): Walk through the five steps of fluid movement in a capillary, applying Starling’s equation.
  4. Group activity (10'): Students label printed capillary diagrams and predict filtration/reabsorption sites.
  5. Check for understanding (5'): Whole‑class “thumbs up/down” on key concepts.
  6. Exit ticket (3'): Write one real‑life example where tissue fluid imbalance causes a problem.
Conclusion:
We reviewed how tissue fluid supports cellular metabolism and how Starling forces regulate its movement. Students now complete an exit ticket summarising the filtration‑reabsorption cycle, and homework is to answer a short worksheet applying the NFP equation to different physiological scenarios.