Explain the relationships among plasma, tissue fluid, and lymph, in terms of movement of water throughout the body. (p. 324)

Question: Explain the relationships among plasma, tissue fluid, and lymph in terms of the movement of water throughout the body. Answer: Plasma, tissue fluid, and lymph are interconnected components of the circulatory system that facilitate the movement of water, nutrients, gases, and waste products throughout the body. Plasma filters out of capillaries to form tissue fluid in the interstitial space, which then exchanges substances with surrounding cells. Some tissue fluid is reabsorbed back into the capillaries due to osmotic pressure difference, while excess tissue fluid is collected by the lymphatic system and becomes lymph. Lymph is ultimately returned to the circulatory system, helping to maintain fluid balance and overall body homeostasis.