👉 The owner fluid, also known as the owner's blood, is a specialized form of blood that circulates within the abdominal cavity and surrounding organs, primarily the liver, spleen, and pancreas. It serves as a reservoir for red blood cells, platelets, and various proteins, playing a crucial role in maintaining the body's internal environment. Unlike circulating blood, which is continuously exchanged with the capillaries throughout the body, owner fluid remains relatively stationary within the abdominal cavity, providing a stable environment for these components to function optimally. This fluid is particularly important during periods of increased metabolic demand or when the circulatory system needs to adapt to changes in blood volume, such as during exercise or in response to injury.