A human circulatory system comprises of Red blood cells, white blood cells and platelets.
You must already be aware of the defence cells of the human body comprising of leukocytes (innate) and antigens, B cells, T cells (adaptive).
Leukocytes are further classified as granulocytes and agranulocytes.
The granulocytes include neutrophils, eosinophils, and basophils.
The agranulocyte consist of lymphocyte and monocytes. White blood cells or WBC plays an extremely significant role in fighting pathogens. Most WBCs are produced by stem cells in bone marrow. The T and B lymphocytes are produced by thymus and spleen respectively. Today we will try to explain each in detail…
Types of Immunity
Innate immune system comes to play instantaneously after an antigen enters the human body. This defence system includes skin, effector cells, antimicrobial peptides, soluble mediators, and cell receptors.
The adaptive immune system is composed of specialized, systemic cells that come to play later in the infection-fighting process and abolish pathogens by inhibiting their growth.
The WBCs is measured as blood test parameter total leukocyte count
|Various Age groups||Total leukocyte count per cubic millimeter|
More than normal TLC counts known as leukocytosis means
Less than normal TLC count or leukopenia means
As much as the measurement and effective working of WBCs important to proper functioning of the body, total leukocyte count as a parameter may mean a lot of things. Thus, this vital parameter is seen in conjugation with various other diagnostic parameters to establish a final conclusion.
Dr. Praveen Roy, Clinical Lead & Senior Consultant – Internal Medicine, Dharamshila Narayana Superspeciality Hospital, Delhi
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