Download White Blood Cells (leukocytes)

White Blood Cells (leukocytes):
1-Is one of the major blood cells in addition to the red cell
and platelets. The main function of white cells is to defend
the body against infectious diseases.
2-are much less than red.
3-have nuclei.
4-White cells are different from the red hemoglobin that
there is no.
5-In fact, the original color of these cells is transparent, but
due to the reflection of light under the microscope they
appear white.
6- Average about 4,000 to 10,000 (mm3) of blood.
Types of white blood cells:
There are several different types of white blood cells.
Core technology for classification is to search for the
presence of granules, which allows cell differentiation to
the categories of popular and unpopular.
A- popular:
is characterized by the presence granules in the
cytoplasm of white blood cell different when viewed
under the microscope. These enzymes to digest the
ingested particles. There are three types of white blood
granulocytes.
B-unpopular:
This is characterized by white blood cells in the absence
of cytoplasmic granules. Although the name means the
absence of granules in these cells, but contain non-specific
granules (Lysosomes). These include white blood cells:
lymphocytes, monocytes, and macrophages.
1- Neutrophil:
These cells are active in phagocytosis. Dealing with
defense against bacterial or fungal infection and other
inflammatory processes small. And usually the first
responders to microbial infection.
Where activity and death in large numbers contribute to
the formation of pus. Have a lobed nucleus and this may
look like multiple nuclei, hence the name leukocyte multicore. Cytoplasm may look transparent because of the
chameleonic small granules in pink light.
These cells are not able to renew the state particle used in
the digestion of the microbes that die after digestion of a
small number of pathogens. This explains why there are
primarily in the pus, and not in the tissues.
10-12 micrometer in diameter
and the ratio of percentages in the blood of
40-75%
2- Basophil:
Primarily responsible for the sensitivity and response to
antigen by secreting chemicals such as histamine.
9-10 micrometer in diameter
and the ratio percentages in the blood of 1%
3- Eosinophil:
Dealing mainly with parasitic infections. And increase in
number can be an indicator of parasitic infection. The
most important reasons for the high Eosinophil (include
allergies such as asthma, hay fever, skin rash; and also
parasitic infections) Generally contain the kernel binary
lobules. Cytoplasm which is filled with pellets that carry
the color pink - orange when coloring by eosin .
10-12 micrometer in diameter
and the ratio percentages in the blood of 1-6%
4- Lymphocyte:
White cells are more common in the lymphatic system.
Lymphocytes that are characterized by dark nucleus is
central and contains a relatively small amount of
cytoplasm.
7-8 micrometer in diameter
and the ratio percentages in the blood of 20-45%
Blood contains three types of lymphocytes:
A- B cells:
B- cells produce antibodies that are associated with
pathogens for destruction. In addition to linking function
after an attack to cause disease, some B cells become
capable of producing antibodies specific for the pathogen
to serve as a memory of the immune system.
B-T cells:
Have a role to help coordinate the immune response and
its importance in defense against intracellular bacteria.
C-Natural killer cells:
Is capable of killing body cells that send signals when
infected by a virus or when they become cancerous.
5-Monocyte:
Nucleus renal form and have abundant cytoplasm.
Function similar to function "vacuum cleaner" of the
neutrophil cells, But much longer because it has an
additional role. Offering of pathogens to T cells to the
antibody is formed, or even be remembered that cause
disease again when the body is exposed to it. Can also
mononuclear cells and leave the bloodstream to the tissues
to become Macrophage to remove cell debris and dead
cells from attacking the microorganisms that cause
disease.
14-17 micrometer in diameter
and the ratio percentages in the blood of 2-6%
6- Macrophage:
Asingle cell to a differentiated cell nucleus Macrophage
after their migration from the blood stream to the tissues.
14-17 micrometer in diameter
Increase in the number of injury