White blood cell ( WBC ) —A white blood cell is one of the three chief types of blood cells. They are produced in the bone marrow and released into the blood. White blood cells are responsible for contending infection. There are several sorts of white blood cells. including monocytes. lymph cells. neutrophils. eosinophils. and basophils.
White blood cells. or leucocytes ( besides spelled “leucocytes” ; from the Grecian word leuko- significance “white” ) . are cells of the immune system involved in supporting the organic structure against both infective disease and foreign stuffs. Five [ 1 ] different and diverse types of leucocytes exist. but they are all produced and derived from a multipotent cell in the bone marrow known as a haematopoietic root cell. They live for approximately three to four yearss in the mean human organic structure. Leukocytes are found throughout the organic structure. including the blood and lymphatic system.
Maton. D. . Hopkins. J. . McLaughlin. Ch. W. . Johnson. S. . Warner. M. Q. . LaHart. D. . & A ; Wright. J. D. . Deep V. Kulkarni ( 1000008 ) . Human Biology and Health. Englewood Cliffs. New Jersey. USA: Prentice Hall.
white blood cells are frequently characterized as granulocytes or agranulocytes: • Granulocytes ( polymorphonuclear leucocytes ) : leucocytes characterised by the presence of otherwise staining granules in their cytol when viewed under light microscopy. These granules are membrane-bound enzymes that act chiefly in the digestion of endocytosed atoms. There are three types of granulocytes: neutrophils. basophils. and eosinophils. which are named harmonizing to their staining belongingss. • Agranulocytes ( mononucleate leucocytes ) : leucocytes characterized by the evident absence of granules in their cytol. Although the name implies a deficiency of granules these cells do incorporate non-specific azurophilic granules. which are lysosomes. [ 4 ] The cells include lymph cells. monocytes. and macrophages. [ 5 ] hypertext transfer protocol: //www. wisc-online. com/objects/index_tj. asp? objID=AP14704 White Blood Cells or Leukocytes protect the organic structure in assorted ways against disease. The ruddy bone marrow’s root cell. the hemocytoblastos. give rise to about all the white blood cells.