Defense mechanisms of the body.
D001419:Bacteria / Q000276:immunology; D004848:Epithelium / Q000502:physiology; D006801:Humans; D007109:Immunity; D007136:Immunoglobulins; D007962:Leukocytes / Q000276:immunology; D008214:Lymphocytes / Q000276:immunology; D008264:Macrophages / Q000276:immunology; D009061:Mouth Mucosa / Q000276:immunology
D007136:Immunoglobulins