Leucocytes are divided into the types: neutrophils, eosinophils, basophils, lymphocytes and monocytes. Each of these types has further derivatives, for example Natural killer cells are derivative of lymphocytes.
There are two lymphoid tissue types:
- Primary Lymphoid tissues, comprising the bone marrow and thymus where leucocytes are synthesized
- Secondary lymphoid tissues, comprising the spleen, lymph nodes and mucosa associated lymphoid tissues (MALT)
Secondary lymphoid tissues contain the mature leucocytes that react to infection, triggering an immune response.
References[edit | edit source]
- "leucocyte". The Free Dictionary.
- "Natural Killer Cells | British Society for Immunology". www.immunology.org. Retrieved Oct 9, 2018.
- Male, D (2007), Immunology, Milton Keynes, The Open University/Milton Keynes, The Open University