Leucocytes White Blood Cells Basar. White Blood cells are also known as Leucocytes as they are...
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![Page 1: Leucocytes White Blood Cells Basar. White Blood cells are also known as Leucocytes as they are colorless due to lack of Haemoglobin. There are about 6000-8000mm.](https://reader035.fdocuments.us/reader035/viewer/2022062223/551b03d155034607418b4b7a/html5/thumbnails/1.jpg)
LeucocytesWhite Blood Cells
Basar
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White Blood cells are also known as Leucocytes as they are colorless due to lack of Haemoglobin.
There are about 6000-8000mm of WBC for 1ml of blood.
These are also called Scavengers & Microscopic policemen
White Blood Corpuscles
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WBC’s
Five Types Classified according to the
presence or absence of granules and the staining characteristics of their cytoplasm.
Leucocytes appear brightly colored in stained preparations, they have a nuclei and are generally larger in size than RBC’s.
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Type of WBC’s
Granulocytes—have large granules in their cytoplasm
NeutrophilsEosinophilsBasophils
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Types of WBC’s
Agranulocytes—do not have granules in their cytoplasm
LymphocytesMonocytes
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GranuloctyesNeutrophils
Stain light purple with neutral dyesGranules are small and numerous—
course appearanceSeveral lobes in nucleus65% of WBC countHighly mobile/very activeDiapedesis—Can leave blood vessels
and enter tissue spacePhagocytosis (eater), contain several
lysosomes (janitor)
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Granulocytes
Eosinophils or Acidophils:Large, numerous granulesNuclei with two lobes2-5% of WBC countFound in lining of respiratory and digestive
tracts Important functions involve protections
against infections caused by parasitic worms and involvement in allergic reactions
Secrete anti-inflammatory substances in allergic reactions
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BasophilsLeast numerous--.5-1%Diapedesis—Can leave blood vessels
and enter tissue spaceContain histamine,serotonin,heparin—
inflammatory chemical
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Agranulocytes
LymphocytesSmallest WBCLarge nuclei/small amount of
cytoplasmAccount for 25% of WBC countTwo types—T lymphocytes—attack an
infect or cancerous cell, B lymphocytes—produce antibodies against specific antigens (foreign body)
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Agranulocytes
MonocytesLargest of WBCsDark kidney bean shaped nucleiHighly phagocytic
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WBC Numbers
Doctors look at WBC numbers. If number goes up there is some kind of
infection and surgery might be needed. Clinics will count the number of WBC’s
in a blood sample, this is called differential count.
A decrease in the number of white blood cells is leukopenia
An increase in the number of white blood cells is leukocytosis.
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Formation of WBC’s
Leucocytes are formed in the red marrow of many bones.
They can also be formed in lymphatic tissue.
They live for about 13-20 days.
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Created by
RGUIIIT,Basar
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