Blood
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Eosinophils<br />
• Percentage: 2- 5% of total leucocytes.<br />
• Shape: spherical<br />
• Size: 12-15 um.<br />
• Nucleus: Bilobed “horse shoe-shaped”.<br />
• Cytoplasm: contains acidophilic refractile<br />
granules.<br />
• E/M:<br />
• Few mitochondria, rER, and Golgi.<br />
• Coarse ellipsoid granules, with electron dense<br />
crystalloid core in the centre.<br />
• These granules contain histaminase and<br />
sulphatase enzyme.<br />
• Life span: 8-12 days.<br />
Dr. Amal M. Moustafa, , Department of Histology & Cytology
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