This document discusses disturbances of fluid and electrolyte balance, including edema, hemorrhage, shock, thrombosis, embolism, and infarction. It covers the normal composition and pressures regulating fluid balance, how imbalances can cause edema, and the pathophysiology and stages of shock. Thrombosis is explained as the formation of clots due to endothelial injury, alterations in blood flow, and hypercoagulability. Embolism, thromboembolism, and the types and appearances of infarction are also summarized.