White blood cells

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white blood cells


White blood cells

A group of several cell types that occur in the bloodstream and are essential for a properly functioning immune system.


the white blood cells (WBC). All types are involved in body defences, e.g. as phagocytes or producers of antibodies. Unlike red blood cells, they are nucleated, aerobic and move freely between the blood and tissue fluids. Of a total white cell count of 5 - 10 × 103 per mm3, more than 50% are neutrophils, which increase in number with many common infections (leucocytosis). These together with the much smaller numbers of basophils and eosinophils have a multilobed nucleus and contain granules with different staining properties. About 35% of WBC are lymphocytes with a major role in immunity. Less numerous, but largest, are the circulating monocytes equivalent to macrophages in the tissues. See also blood cells, lymphatic system. See fig overleaf .

Patient discussion about White blood cells

Q. can i get a short explanation about white blood cells and their job? what does it mean if i have a insafition

A. White blood cells (WBC's) are the ones responsible for the immune system in the body. The white blood cell count rises in cases of infection, steroid use and other conditions. A low white blood cell count can have many causes, which need to be further evaluated by a doctor.

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References in periodicals archive ?
In diapedesis, the white blood cell is active because it changes its shape in order to exit.
We undertook this study to understand the correlation between consuming a Mediterranean diet and specific health markers, including platelet levels and white blood cell counts, which can more specifically explain the diet's benefits in reducing the long-term risk of cerebral and heart disease or other chronic conditions," lead study author Marialaura Bonaccio, PhD, of the Department of Epidemiology and Prevention at the IRCCS Istituto Neurologico Mediterraneo NEUROMED in Italy said.
We have known how white blood cells find their way to sites of infection for many years, but understanding how, or even why white blood cells go to sites of sterile non-infectious tissue damage has been a real dilemma," says Dr.
These associations were not found in healthy men, even though the two groups did not differ significantly in the total levels of white blood cells in their expressed prostatic secretions.
In clinical trials conducted in patients with chronic phase CML after interferon failure, close to 90 per cent of patients had white blood cell counts return to normal and approximately 50 per cent had a major cytogenetic response (measure of the percentage of cells that are positive for the Philadelphia (Ph) chromosome, a common marker for CML).
The 23-month-old girl could go home within a week if the white blood cells reach an acceptable level and stabilize for several consecutive days and if she continues to eat well and to take her medication.
When white blood cells that are sensitive to myelin are stimulated, they can leave the bloodstream, move through the protective blood-brain barrier, and enter the central nervous system.
Like all blood cells, white blood cells form in bone marrow, a fatty tissue that fills the hollow spaces inside bones.
The scientists eventually discovered that white blood cells called macrophages, which rushed in immediately following the lens injury, were responsible for this effect.
Donor white blood cells can cause reactions in the patient at the time of transfusion and are also known to transmit disease and predispose transfusion recipients to infection.
Ami Shah, Meghan's physician at Childrens Hospital Los Angeles, said the increase in the white blood cells makes Meghan less susceptible to infections.
White blood cells that react against myelin, specifically against a major component called myelin basic protein, were discovered in the animal form of MS, called EAE (experimental autoimmune encephalomyelitis) and in human MS.