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UNIT 3 Nursing care of patients with common signs and symptoms and management. ✅ Fluid and Electrolyte Imbalance: 🔷 Introduction The human body is composed of about 60% water, which is distributed between: Electrolytes like sodium (Na⁺), potassium (K⁺), calcium (Ca²⁺), magnesium (Mg²⁺), chloride (Cl⁻), bicarbonate (HCO₃⁻), and phosphate (PO₄³⁻) are dissolved in these fluids and help maintain vital functions. When fluid or electrolytes are lost or gained excessively or