<Li> Low pH vesicles (3.5 - 4.0) </Li> <Li> Toxic nitrogen oxides (nitric oxide) </Li> <Li> Toxic oxygen - derived products (e.g., superoxide, hydrogen peroxide, hydroxy radicals, singlet oxygen, hypohalite) </Li> <P> Granulocytopenia is an abnormally low concentration of granulocytes in the blood . This condition reduces the body's resistance to many infections . Closely related terms include agranulocytosis (etymologically, "no granulocytes at all"; clinically, granulocyte levels less than 5% of normal) and neutropenia (deficiency of neutrophil granulocytes). Granulocytes live only one to two days in circulation (four days in spleen or other tissue), so transfusion of granulocytes as a therapeutic strategy would confer a very short - lasting benefit . In addition, there are many complications associated with such a procedure . </P>

What is the most abundant type of cell in blood