神马文学网cells
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Blood cells:
1. white blood cells:
1) granulocytes
(1) neutrophil
(2) eosinophil
(3) basophil
2) Agranulocytes (mononuclear leucocytes):
(1) Lymphocytes:Lymphocytes are much more common in the lymphatic system. Lymphocytes aredistinguished by having a deeply staining nucleus which may be eccentricin location, and a relatively small amount of cytoplasm. The blood has threetypes of lymphocytes:
B cells: B cellsmakeantibodiesthat bind topathogensto enable their destruction. (B cells not only makeantibodies thatbind topathogens,but after an attack, some B cells will retain the ability to produce anantibody to serve as a ‘memory‘ system.)
Tcells
CD4+ (helper) T cells co-ordinate the immune response andare important in the defence against intracellular bacteria.
CD8+cytotoxic T cells are able to kill virus-infectedandtumor cells.
γδ T cells possess an alternative T cellreceptor as opposed to CD4+ and CD8+ αβ T cells and share characteristics of helper T cells, cytotoxic T cells and natural killer cells.
Natural killer cells: Natural killer cells areable to kill cells of the body which are displaying a signal to kill them, asthey have been infected by avirusor have becomecancerous.
(2) Nonocytes
(3) Macrophages
2. red cells
3. platelets
Cell in tissue:
1. mast cells: Themast cell, acell intissues, has many similar characteristics with basophil. For example, both cell types storehistamine, a chemical that is secreted by the cells when stimulated in certain ways (histamine causes some of the symptoms of anallergic reaction).
Overview table of white blood cells
Type Microscopic Appearance Diagram Approx. %
in adults[3]
See also:
Blood values Diameter (μm)[3] Main targets[1] Nucleus[1] Granules[1] Lifetime[3]
Neutrophil
40-75% 10-12bacteria
fungi
multilobed fine, faintly pink 6 hours-few days
(days inspleen and other tissue)
Eosinophil
1-6% 10-12parasites
inallergic reactions
bi-lobed full of pink-orange (when stained) 8-12 days
Basophil
<1% 9-10 inallergic reactions
bi- or tri-lobed large blue ?
Lymphocyte
20-45% 7-8B cells: variouspathogens
T cells:CD4+ (helper): intracellular bacteria.
CD8+cytotoxic T cells:virus-infected andtumor cells.
γδ T cells:
Natural killer cells:virus-infected andtumor cells.
deeply staining, eccentric only NK-cells[4] weeks to years
Monocyte
2-6% 14-17 various kidney shaped none months-years
Macrophage
N/A days
1. white blood cells:
1) granulocytes
(1) neutrophil
(2) eosinophil
(3) basophil
2) Agranulocytes (mononuclear leucocytes):
(1) Lymphocytes:Lymphocytes are much more common in the lymphatic system. Lymphocytes aredistinguished by having a deeply staining nucleus which may be eccentricin location, and a relatively small amount of cytoplasm. The blood has threetypes of lymphocytes:
B cells: B cellsmakeantibodiesthat bind topathogensto enable their destruction. (B cells not only makeantibodies thatbind topathogens,but after an attack, some B cells will retain the ability to produce anantibody to serve as a ‘memory‘ system.)
Tcells
CD4+ (helper) T cells co-ordinate the immune response andare important in the defence against intracellular bacteria.
CD8+cytotoxic T cells are able to kill virus-infectedandtumor cells.
γδ T cells possess an alternative T cellreceptor as opposed to CD4+ and CD8+ αβ T cells and share characteristics of helper T cells, cytotoxic T cells and natural killer cells.
Natural killer cells: Natural killer cells areable to kill cells of the body which are displaying a signal to kill them, asthey have been infected by avirusor have becomecancerous.
(2) Nonocytes
(3) Macrophages
2. red cells
3. platelets
Cell in tissue:
1. mast cells: Themast cell, acell intissues, has many similar characteristics with basophil. For example, both cell types storehistamine, a chemical that is secreted by the cells when stimulated in certain ways (histamine causes some of the symptoms of anallergic reaction).
Overview table of white blood cells
Type Microscopic Appearance Diagram Approx. %
in adults[3]
See also:
Blood values Diameter (μm)[3] Main targets[1] Nucleus[1] Granules[1] Lifetime[3]
Neutrophil
40-75% 10-12bacteriafungi
multilobed fine, faintly pink 6 hours-few days
(days inspleen and other tissue)
Eosinophil
1-6% 10-12parasitesinallergic reactions
bi-lobed full of pink-orange (when stained) 8-12 days
Basophil
<1% 9-10 inallergic reactionsbi- or tri-lobed large blue ?
Lymphocyte
20-45% 7-8B cells: variouspathogensT cells:CD4+ (helper): intracellular bacteria.
CD8+cytotoxic T cells:virus-infected andtumor cells.
γδ T cells:
Natural killer cells:virus-infected andtumor cells.
deeply staining, eccentric only NK-cells[4] weeks to years
Monocyte
2-6% 14-17 various kidney shaped none months-yearsMacrophage
N/A days