Body Fluid Compartments -- Interpretation of Urine Electrolytes and Osmolality -- Renal Handling of NaCl and Water -- Intravenous Fluids: Composition and Indications -- Diuretics -- Disorders of Extracellular Fluid Volume: Basic Concepts -- Disorders of ECF Volume: Congestive Heart Failure -- Disorders of ECF Volume: Cirrhosis of the Liver -- Disorders of ECF Volume: Nephrotic Syndrome -- Disorders of ECF Volume: Volume Contraction -- Disorders of Water Balance: Physiology -- Disorders of Water Balance: Hyponatremia -- Disorders of Water Balance: Hypernatremia -- Disorders of Potassium: Physiology -- Disorders of Potassium: Hypokalemia -- Disorders of Potassium: Hyperkalemia -- Disorders of Calcium: Physiology -- Disorders of Calcium: Hypocalcemia -- Disorders of Calcium: Hypercalcemia -- Disorders of Phosphate: Physiology -- Disorders of Phosphate: Hypophosphatemia -- Disorders of Phosphate: Hyperphosphatemia -- Disorders of Magnesium: Physiology -- Disorders of Magnesium: Hypomagnesemia -- Disorders of Magnesium: Hypermagnesemia -- Acid-Base Physiology -- Evaluation of an Acid-Base Disorder -- High Anion Gap Metabolic Acidosis -- Hyperchloremic Metabolic Acidosis: Renal Tubular Acidosis -- Hyperchloremic Metabolic Acidosis: Nonrenal Causes -- Metabolic Alkalosis -- Respiratory Acidosis -- Respiratory Alkalosis -- Mixed Acid-Base Disorders -- Fluid, Electrolyte and Acid-Base disorders in Special Conditions - Acute kidney injury -- Fluid, Electrolyte and Acid-Base disorders in Special Conditions - Chronic kidney disease -- Fluid, Electrolyte and Acid-Base disorders in Special Conditions - Kidney transplantation -- Fluid, Electrolyte and Acid-Base disorders in Special Conditions - Pregnancy -- Fluid, Electrolyte and Acid-Base disorders in Special Conditions - Liver disease.