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- (b) Explain why the colloid osmotic pressure of the plasma is much higher than the colloid osmotic pressure of interstitial fluid and why this is important in ensuring excess tissue fluid does not accumulate to cause edema.Explain how changes in hydrostatic and colloid osmotic pressure may cause edema?a. Describe how excessive fluid is lost from the body duringstrenuous exercise on a very hot day. Explain how thebody can respond to this fluid loss to maintainhomeostasis.b. What factors may limit such responses?