Diagram showing lymph formation, circulatory pathways, and structure of the human heart for easy understanding. 💧 15.2 Lymph (Tissue Fluid) 🔹 How lymph is formed: Blood flows through capillaries (small blood vessels) Some water + small dissolved substances move out of blood 🔹 Where does this fluid go? It enters spaces between body cells 🔹 What remains in blood? Large proteins Most blood cells 🔹 This fluid is called: 👉 Interstitial fluid / Tissue fluid 🔹 Movement of substances: Nutrients, gases move between: Blood ↔ Cells This exchange happens through this fluid 🔹 Lymphatic system: A network of vessels collects this fluid Returns it back to blood (veins) 🔹 What is lymph? Fluid inside lymph vessels = Lymph 🔹 Composition of lymph: Similar to plasma Contains lymphocytes (WBCs) 🔹 Functions of lymph: Immunity (defense) Transport of: Nutrients Hormones Fats 🔹 Special point: Fats are absorbed by lymph in lacteals (intest...