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PSIO 202, lecture 3

PSIO 202, lecture 3 - PSIO 202 Human Anatomy and Physiology...

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PSIO 202 PSIO 202 Human Anatomy and Physiology Human Anatomy and Physiology Lecture 3 Cardiovascular System: The Blood; White Blood Cells
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Objectives and Reading Assignment ± Reading: Tortora, pages 699-703 ± Lecture objectives ± Describe the origin and production of the various white blood cells ± List the characteristics and functions of red blood cells ± Categorize each of the white blood cell types on the basis of structure and function ± Describe the anatomy, physiology and relevance of phagocytosis
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White Blood Cells ± All WBCs (leukocytes) have a nucleus, but no hemoglobin ± Granular or agranular classification based on presence of cytoplasmic granules made visible by staining ± granulocytes are neutrophils, eosinophils and basophils ± agranulocytes are monocytes and lymphocytes
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Hematopoiesis-WBCs
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Neutrophils (Granulocyte) ± Polymorphonuclear Leukocytes or “Polymorphs” ± Nuclei = 2 to 5 lobes connected by thin strands ± Fine, pale lilac practically invisible granules ± Diameter is 10-12 microns ± 60 to 70% of circulating WBCs
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Eosinophils (Granulocyte) ± Nucleus with 2 or 3 lobes connected by a thin strand ± Large, uniform-sized granules stain orange-red with acidic dyes ± do not obscure the nucleus ± Diameter is 10 to 12 microns ± 2 to 4% of circulating WBCs
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Basophils (Granulocyte) ± Large, dark purple, variable-sized granules stain with basic dyes ±
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