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A stable internal environment

A stable internal environment

The internal environment is the blood and tissue fluid surrounding the body's cells. Its temperature, water content, ion concentration, glucose concentration and pH must remain within narrow limits.

7.3 Homeostasis and thermoregulation Lesson

  1. GCSE
  2. /Biology
  3. /7.3 Homeostasis and thermoregulation

Step-by-step lessons on Edexcel GCSE Biology 7.3 Homeostasis and thermoregulation, covering 7.3.1 Importance of a constant internal environment, 7.3.2 Importance of homeostasis, 7.3.3a Thermoregulation via the skin and hypothalamus, and 7.3.3b Vasoconstriction and vasodilation in thermoregulation. Each one builds up to exam-style questions. Start with the foundational topics and build up to the higher-tier material.

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