What condition is described as a disturbance in circulation leading to an accumulation of fluid in tissues?

The condition characterized by a disturbance in circulation that results in the accumulation of fluid in tissues is edema. This pathological process occurs when there is an imbalance in the forces that regulate fluid exchange between blood vessels and surrounding tissues. When capillary permeability increases or when there is obstruction in venous return, fluid can leak into interstitial spaces, leading to swelling.

Edema can be caused by several factors, including heart failure, which can lead to increased venous pressure; inflammation, which can alter capillary permeability; and renal conditions that affect sodium and water balance. Understanding edema is crucial in pathology because it can be indicative of underlying health issues.

The other options, such as regeneration, refer to the process of tissue repair and restoration after injury, while scar formation pertains to the final stage of tissue healing involving fibrous tissue replacement. Exocytosis involves the process of vesicles fusing with the plasma membrane to release their contents outside the cell, which does not relate to fluid accumulation in tissues. Therefore, edema is the only choice that accurately describes the condition in question.