Physiological Functions of Blood

Blood is a perfect amalgamation of cells, proteins, and chemicals in a fluid medium that interconnects the various parts of the human body. The blood has diverse functions, which can be broadly classified into transport, defense, and homeostasis. It ensures the supply of oxygen, nutrients, and hormones to the sites where they are needed and carry carbon dioxide and metabolites to their port of elimination. The leucocytes and the chemicals needed to fight an infection, the thrombocytes, and the clotting factors necessary to control hemorrhage, and the efficient buffer system to maintain the acid-base status to ensure optimum body functions are all present in the blood. Blood circulation is essential for preserving human life.