👉 The highlighted fluid refers to blood, the circulatory system's primary transport medium. Composed mainly of water, red and white blood cells, platelets, and various proteins, it circulates throughout the body via a network of arteries, veins, and capillaries. Blood's primary roles include delivering oxygen and nutrients to cells, removing waste products, regulating body temperature, and supporting immune responses. It acts as a vital medium for chemical exchange and plays a crucial role in maintaining homeostasis.
