Blood is a cellular organization made up of tangible components of cells (red blood cells, white blood cells, platelets) and plasma. The main function of the blood is to provide nutrients and structure the organization as well as eliminate waste during metabolism of the body such as carbonic gas and lactic acid. Blood is also the transport vehicle for cells (both cells that protect the body and pathological cells) and various substances (amino acids, lipids, hormones) between organs and organs in the body. the body. Disorders of the composition of the blood or affecting its normal circulation can lead to dysfunction of many different organs. There are two relatively independent but anatomically independent circulatory cycles: the pulmonary circulation (also known as the microcirculation) and the systemic circulation (also known as the big circulation). These two cycles are operated primarily by the pumping power of the heart muscle.