Lesson Plan

• Describe the proportion of water in plasma and tissue fluid.
• Explain how water’s solvent properties enable transport of nutrients, gases, and wastes.
• Analyse how water’s high specific heat capacity helps maintain a stable temperature for transport processes.
• Relate these properties to the overall efficiency of mammalian circulatory transport.

• Projector or interactive whiteboard
• PowerPoint slides on water properties
• Handout summarising key facts and the property‑role table
• Diagram of a capillary exchange (digital or printed)
• Exit‑ticket cards
• Markers and whiteboard

Begin with a quick poll: “What would happen to your body if water made up only 10 % of blood?” Use the responses to remind students that blood is mostly water. Review prior knowledge of blood components and introduce today’s success criteria: students will identify water’s proportion, explain its solvent action, and describe its heat‑buffering role in transport.

1. Do‑Now (5') – Students list substances they know travel in blood; share answers.
2. Mini‑lecture (10') – Present data on water’s percentage in plasma and tissue fluid and introduce solvent action with slide visuals.
3. Interactive demonstration (8') – Show a simple model of water polarity and discuss how it dissolves ions and gases.
4. Group activity (12') – Using the provided table, teams match water properties to physiological transport roles and add one additional example each.
5. Concept check (5') – Quick Kahoot quiz on specific heat capacity and temperature buffering.
6. Summary discussion (5') – Students articulate, in one sentence, why water is essential for mammalian transport.

Recap the two key properties—solvent action and high specific heat capacity—and how they support efficient transport in the circulatory system. Students complete an exit ticket stating one real‑world implication of each property. For homework, assign a brief research task: find another physiological system where water’s heat‑buffering role is critical.