👉 The existing fluid, which can refer to various bodily fluids depending on the context, is a substance that circulates within the body's systems. Primarily, it includes blood, a vital fluid composed of plasma and cellular components like red and white blood cells, platelets, and various proteins, which transports oxygen, nutrients, hormones, and waste products throughout the body. Other examples include synovial fluid that lubricates joints, cerebrospinal fluid that cushions the brain and spinal cord, and mucus that lines various surfaces to trap pathogens and debris. These fluids play essential roles in maintaining homeostasis, facilitating cellular communication, and protecting organs and tissues from damage.
