News tagged with white blood cells

Related topics: cells , immune system , immune cells , t cells , immune response

Why dark chocolate is good for your heart

It might seem too good to be true, but dark chocolate is good for you and scientists now know why. Dark chocolate helps restore flexibility to arteries while also preventing white blood cells from sticking to the walls of ...

Feb 27, 2014
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Blood stem cell longevity explained

(Medical Xpress)—The blood stem cells that live in bone marrow are at the top of a complex family tree. Such stem cells split and divide down various pathways that ultimately produce red cells, white cells ...

Nov 26, 2013
popularity 5 / 5 (8) | comments 0 | with audio podcast

Study shows how Staph toxin disarms the immune system

Researchers at NYU Langone Medical Center have discovered a new mechanism by which the deadly Staphylococcus aureus bacteria attack and kill off immune cells. Their findings, published today in the journal Cell Host & Mi ...

Oct 16, 2013
popularity 4.9 / 5 (7) | comments 0 | with audio podcast

Rare form of leukemia found to originate in stem cells

(Medical Xpress)—An international team of researchers working out of the University of Toronto has found that one type of rare leukemia appears to get its start in stem cells. In their paper published in ...

Feb 13, 2014
popularity 5 / 5 (6) | comments 1 | with audio podcast report

White blood cell

White blood cells (WBCs), or leukocytes (also spelled "leucocytes"), are cells of the immune system defending the body against both infectious disease and foreign materials. Five different and diverse types of leukocytes exist, but they are all produced and derived from a multipotent cell in the bone marrow known as a hematopoietic stem cell. Leukocytes are found throughout the body, including the blood and lymphatic system.

The number of leukocytes in the blood is often an indicator of disease. There are normally between 4×109 and 1.1×1010 white blood cells in a litre of blood, making up approximately 1% of blood in a healthy adult. An increase in the number of leukocytes over the upper limits is called leukocytosis, and in leukopenia, this number is much lower than the lower limit. The physical properties of leukocytes, such as volume, conductivity, and granularity, may change due to activation, the presence of immature cells, or the presence of malignant leukocytes in leukemia.

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