Definition: Phagocytizes microorganisms and other substances
% of WBCs: 60–80%
Response: Inflammation response
Site of maturation: Red bone marrow
Location of mature cells: Blood, connective and lymphatic tissue
Secretes: Histamine, complement proteins, leukotrienes, kinins and
interferon
Type of immunity: Innate (from birth)Lymphocytes (B-Cells)
Definition: Produces antibodies and other chemicals responsible for
destroying microorganisms
% of WBCs: 20–40%
Response: Extracellular (outside) protection from antigens (viruses,
bacterial, chemical) Site of maturation: Red bone marrow, spleen,
lymph nodes
Location of mature cells: Blood and lymphatic tissues and nodes
Secretes: Antibodies
Type of immunity: Antibody-mediatedLymphocytes (T-Cells)
Definition: Produces antibodies and other chemicals responsible for
destroying microorganisms
% of WBCs: 0–40%
Response: Intracellular (inside) protection from antigens (parasites,
tumors); also known as tumor busters
Site of maturation: Red bone marrow, spleen, lymph nodes
Location of mature cells: Thymus gland