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An excess of white blood cells is usually due to infection or inflammation. Less commonly, a high white blood cell count could indicate certain blood cancers or bone marrow disorders. The number of leukocytes in the blood is often an indicator of disease, and thus the white blood cell count is an important subset of the complete blood count.
A blood cell (also called a hematopoietic cell, hemocyte, or hematocyte) is a cell produced through hematopoiesis and found mainly in the blood. Major types of blood cells include red blood cells (erythrocytes), white blood cells (leukocytes), and platelets (thrombocytes).
The formed elements are the two types of blood cell or corpuscle – the red blood cells, (erythrocytes) and white blood cells (leukocytes), and the cell fragments called platelets [12] that are involved in clotting. By volume, the red blood cells constitute about 45% of whole blood, the plasma about 54.3%, and white cells about 0.7%.
One can see red blood cells, several knobby white blood cells including lymphocytes, a monocyte, a neutrophil, and many small disc-shaped platelets. A monocyte count is part of a complete blood count and is expressed either as a percentage of monocytes among all white blood cells or as absolute numbers. Both may be useful, but these cells ...
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Leukocytosis is a condition in which the white cell count is above the normal range in the blood. [1] [2] It is frequently a sign of an inflammatory response, [3] most commonly the result of infection, but may also occur following certain parasitic infections or bone tumors as well as leukemia.
Corpuscle (/ ˈ k ɔːr p ə s əl /) or corpuscule, meaning a "small body", is often used as a synonym for particle. It may also refer to: It may also refer to: Corpuscularianism , the atomistic view that all physical objects are composed of corpuscles, which was dominant among 17th century European thinkers
Any of the various types of large white corpuscles of the blood and lymph in humans and other vertebrates, including phagocytes with granular cytoplasm and other immunologically active cells with clear cytoplasm. US leukocyte. Also called a white blood cell or white blood corpuscle . See also granulocyte , lymphocyte , monocyte , stem cell .