👉 The primary fluid in the body is blood, a complex mixture of water, proteins, nutrients, hormones, and waste products. Blood serves as the circulatory system's main transport network, carrying oxygen, nutrients, and essential substances to cells while removing carbon dioxide, toxins, and waste products. Composed of plasma (about 55% water), red blood cells, white blood cells, and platelets, blood plays a crucial role in maintaining homeostasis, defending against infections, and facilitating chemical reactions necessary for bodily functions.
