monocyte
Macrophage precursor cell
A monocyte is a type of white blood cell that circulates in the bloodstream before migrating into tissues, where it transforms into a macrophage or dendritic cell to fight infection.
Monocytes are part of the immune system's first line of defense, engulfing pathogens and debris: The blood test showed elevated monocyte levels.
Inherited pathogen defense system
- cytokineImmune signaling molecule
- interleukinImmune-signaling protein from leukocytes
- interferonImmune response protein
- T-cellThymus-derived immune lymphocyte
B-cell · antibody · immunoglobulin · complement · lymphatic · spleen · thymus · lymph node
Immune system's cellular soldier
- lymphocyteImmune system white cell
- neutrophilMulti-lobed immune cell
- basophilGranular immune cell type
- eosinophilAcidophilic white blood cell
platelet · thrombocyte · plasma · serum · hematocrit · hemoglobin · bone marrow · hematopoiesis
Immune signaling proteins
- chemotaxisMovement toward chemical cues
- tissue damageHarm to body cells
- edemaPathological tissue puffiness
- swellingAbnormal tissue enlargement
redness · heat · pain · prostaglandins · histamine · vasodilation · granuloma · chronic inflammation
Disease-causing microorganism
- bacteriaNucleus-free single-celled organisms
- virusMicroscopic infectious agent
- parasiteOne exploiting a host
- fungusSpore-bearing organism
sepsis · bacteremia · fever · immune response · antimicrobial · pyrogenic · abscess · tuberculosis
Complete surrounding and absorption
- lysosomeDigestive organelle in cells
- endocytosisCell engulfs external material
- Kupffer cellLiver's resident immune cell
innate immunity
Inherited pathogen defense system
- cytokineImmune signaling molecule
- interleukinImmune-signaling protein from leukocytes
- interferonImmune response protein
T-cell · B-cell · antibody · immunoglobulin · complement · lymphatic · spleen · thymus · lymph node · immunology
white blood cell
Immune system's cellular soldier
- lymphocyteImmune system white cell
- neutrophilMulti-lobed immune cell
- basophilGranular immune cell type
eosinophil · platelet · thrombocyte · plasma · serum · hematocrit · hemoglobin · bone marrow · hematopoiesis · circulation
cytokines
Immune signaling proteins
- chemotaxisMovement toward chemical cues
- tissue damageHarm to body cells
- edemaPathological tissue puffiness
swelling · redness · heat · pain · prostaglandins · histamine · vasodilation · granuloma · chronic inflammation · wound healing
pathogen
Disease-causing microorganism
- bacteriaNucleus-free single-celled organisms
- virusMicroscopic infectious agent
- parasiteOne exploiting a host
fungus · sepsis · bacteremia · fever · immune response · antimicrobial · pyrogenic · abscess · tuberculosis · leishmaniasis
engulfment
Complete surrounding and absorption
- lysosomeDigestive organelle in cells
- endocytosisCell engulfs external material
- Kupffer cellLiver's resident immune cell
monocytelymphocyte
Immune system white cell
T cell · granulocyte · B cell · neutrophil · eosinophil