advertisement
Reference Terms
from Wikipedia, the free encyclopedia

1

2

White blood cell

White blood cells (also called leukocytes or immune cells) are cells which form a component of the blood.

They help to defend the body against infectious disease and foreign materials as part of the immune system.

There are normally between 4x109 and 11x109 white blood cells in a litre of healthy adult blood - about 7,000 to 25,000 white blood cells per drop.

In conditions such as leukaemia this may rise to as many as 50,000 white blood cells in a single drop of blood.

As well as in the blood, white cells are also found in large numbers in the lymphatic system, the spleen, and in other body tissues.

Note:   The above text is excerpted from the Wikipedia article "White blood cell", which has been released under the GNU Free Documentation License.
Related Stories
 

1

2


Health & Medicine News
August 11, 2020

A new blood test demonstrated remarkable promise in discriminating between persons with and without Alzheimer's disease and in persons at known genetic risk may be able to ...
The lack of human activity during lockdown caused human-linked vibrations in the Earth to drop by an average of 50 percent ...
Scientists have discovered extinct strains of smallpox in the teeth of Viking skeletons -- proving for the first time that the killer disease plagued humanity for at least ...
Nerve cells have a special ion channel that has a key role in starting the electrical impulse that signals pain and is sent to the brain. New research finds that people who ...
Latest Headlines
updated 12:56 pm ET