Human Blood Composition and Cell Types

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Composition of human blood

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Human blood is composed of red blood cells, white blood cells, platelets, and plasma.

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Blood cells in a normal peripheral smear

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A normal peripheral smear shows red blood cells, white blood cells, and platelets.

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Differences between eosinophils and basophils

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Eosinophils have a bilobed nucleus and are involved in allergic reactions and parasitic infections. Basophils have a lobed nucleus and release histamine during allergic reactions.

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Four characteristics of lymphocytes

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1. Small size 2. Large nucleus 3. Thin rim of cytoplasm 4. High nucleus-to-cytoplasm ratio

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Morphological features helpful in identifying monocytes

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1. Large size 2. Kidney-shaped nucleus 3. Abundant cytoplasm 4. Fine azurophilic granules

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Comparison of a large lymphocyte and a monocyte

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Large lymphocytes have a round nucleus and less cytoplasm, while monocytes have a kidney-shaped nucleus and more cytoplasm.

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Proper cell maturation sequence of the erythroid series

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1. Proerythroblast 2. Basophilic erythroblast 3. Polychromatic erythroblast 4. Orthochromatic erythroblast 5. Reticulocyte 6. Erythrocyte

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Proper cell maturation sequence for myelopoiesis (granulocytopoiesis)

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1. Myeloblast 2. Promyelocyte 3. Myelocyte 4. Metamyelocyte 5. Band cell 6. Mature neutrophil

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Morphological features of promyelocyte

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Promyelocytes are larger cells with prominent nucleoli and abundant azurophilic granules.

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Morphological features of neutrophilic myelocyte

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Neutrophilic myelocytes have a round nucleus and specific granules start to appear.