తెల్ల రక్తకణాలు
తెల్ల కణాలు లేదా తెల్ల రక్తకణాలు (White Cells or White Blood Cells) రక్తం లోని ఒక విధమైన కణాలు.
తెల్లకణాల పట్టిక
| Type | Microscopic Appearance | Diagram | Approx. % in adults | Diameter (μm) | Main targets | Nucleus | Granules | Lifetime |
|---|---|---|---|---|---|---|---|---|
| Neutrophil |  |  | 54-62% | 10-12 |
| multilobed | fine, faintly pink | 6 hours-few days (days in spleen and other tissue) |
| Eosinophil |  | 1-6% | 10-12 |
| bi-lobed | full of pink-orange (when stained) | 8-12 days (circulate for 4-5 hours) | |
| Basophil |  |  | <1% | 12-15 |
| bi- or tri-lobed | large blue | ? |
| Lymphocyte |  |  | 25-33% | 7-8 |
| deeply staining, eccentric | NK-cells and Cytotoxic (CD8+) T-cells | weeks to years |
| Monocyte |  | 2-8% | 14-17 | Monocytes migrate from the bloodstream to other tissues and differentiate into tissue resident macrophages or dendritic cells. | kidney shaped | none | hours-days | |
| Macrophage |  |  | 21 (human) 13 (rat) | Phagocytosis (engulfment and digestion) of cellular debris and pathogens, and stimulation of lymphocytes and other immune cells that respond to the pathogen. | activated=days immature=months-years | |||
| Dendritic cells |  |  | Main function is as an antigen-presenting cell (APC) that activates T lymphocytes. | similar to macrophages |
మూలాలు
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