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Red blood cells (or erythrocytes) are the most abundant type of blood cell (98% of all cells).
Red blood cells are involved in transporting oxygen and carbon dioxide. They circulate in blood for between 100 to 120 days.
• Red blood cells (60x)
Also see EM 206 Red Blood Cells.
Platelets are small cell fragments produced by budding from megakaryocytes under the influence of thrombopoietin. Each megakaryocyte produces between 5,000 and 10,000 platelets.
Platelets are much smaller than red blood cells.
Platelets are typically found as clusters:
• Platelets (60x)
Platelets are involved in the formation of blood clots. Too few platelets can cause excessive bleeding, while too many platelets can cause blood clot formation. Their life span is between 7 to 10 days.
Also see EM 159 Platelet.
Neutrophils (also known as polymorphonuclear leukocytes [PMN]) are the most abundant type of white blood cells (60-70%).
• Neutrophil #1 (60x)
• Neutrophil #2 (60x)
• Neutrophil #3 (60x)
• Neutrophils #4 (60x)
• Neutrophil #5 (60x)
Neutrophils phagocytose and destroy bacteria. They circulate in blood for 8 to 16 hrs and survive in peripheral tissues for only 1 to 2 days.
Also see EM 169 Neutrophil.
Eosinophils are a small component of white blood cells (2-4%).
• Eosinophil #1 (60x)
• Eosinophil #2 (60x)
• Eosinophil #3 (60x)
• Eosinophil #4 (60x)
Eosinophils kill multicellular parasites and phagocytose immune complexes. They circulate in the blood for 8 to 16 hrs and survive in peripheral tissues for only 2 to 5 days.
Also see EM 161 Eosinophil.
Basophils are rare white bloods (<1%).
• Basophil #1 (60x)
• Basophil #2 (60x)
Basophils mediate inflammatory responses.
Also see EM 168 Basophil.
Lymphocytes are a large component of white blood cells (20 to 25%).
• Lymphocyte #1 (60x)
• Lymphocytes #2 (60x)
• Lymphocyte #3 (60x)
• Lymphocyte #1 (60x)
• Lymphocyte #2 (60x)
Lymphocytes are released from bone marrow into the peripheral circulation. They exit blood into one of the peripheral lymphatic organs and continue to divide.
Also see EM 199 Lymphocyte and EM 171 Lymphocyte.
Monocytes are the largest type of white blood cell.
• Monocyte #1 (60x)
• Monocyte #2 (60x)
• Monocyte #3 (60x)
Monocytes are released from the bone marrow into the peripheral circulation. Their time span in blood is only 16 hrs. Monocytes in connective tissue differentiate into macrophages.
Monocytes are involved in phagocytosis and antigen presentation.
Also see EM 170 Monocyte.