👉 The kept fluid, also known as the reticulum and liver sinusoidal fluid, is a vital component of the circulatory system that circulates between blood capillaries and tissues. This fluid is a mixture of plasma, proteins, and various cellular elements, including red blood cells, white blood cells, and platelets. Unlike plasma, which is found in the bloodstream, the kept fluid resides within the liver sinusoids, specialized capillaries that allow for efficient exchange of nutrients, waste products, and other substances. This unique environment facilitates the liver's crucial functions, such as detoxification, protein synthesis, and metabolism regulation. The kept fluid plays a pivotal role in maintaining homeostasis by ensuring that nutrients are delivered to tissues while waste products are removed, highlighting its importance in overall bodily health.