👉 The fluid, often referred to as blood in the context of human physiology, is a complex mixture of cells and substances that circulate throughout the body to perform essential functions. It primarily consists of red blood cells, white blood cells, platelets, plasma (the liquid component), and various proteins, enzymes, and hormones. Red blood cells carry oxygen from the lungs to tissues and return carbon dioxide back to the lungs, while white blood cells are part of the immune system, defending against infections and foreign invaders. Plasma transports nutrients, hormones, and waste products, maintaining fluid balance and supporting cellular functions. This dynamic fluid ensures the body's homeostasis, nutrient delivery, waste removal, and immune response, making it a critical component of overall health and survival.
