Blood

Blood is a vital fluid in the body that transports oxygen, nutrients, hormones, and waste products between organs and tissues. It consists of red blood cells, which carry oxygen; white blood cells, which fight infections; platelets, which aid in clotting; and plasma, the liquid part that carries everything else. Blood plays a crucial role in maintaining body temperature and pH balance, as well as in the immune response. Proper blood circulation is essential for overall health, and its composition can indicate various health conditions.