👉 The host fluid, also known as the interstitial fluid, is a vital component of the body's extracellular environment, primarily found within the spaces between cells and surrounding tissues. It acts as a medium for the transport of nutrients, waste products, hormones, and other essential molecules throughout the body. Host fluid is characterized by its low protein content compared to blood plasma, making it more similar to the interstitial fluid found in tissues. It plays a crucial role in maintaining homeostasis, supporting cellular functions, and facilitating the exchange of substances between cells and the bloodstream. This fluid is continuously produced and circulated by the kidneys, heart, and lymphatic system, ensuring that cells receive the necessary resources while waste products are efficiently removed.
