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21 Cards in this Set
- Front
- Back
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What are the 3 general categories of cells found in blood and what are their (general) functions?
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-erythrocytes: transport O2 and CO2
-leukocytes: defense and immune response - thrombocytes: coagulation |
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What kind of tissue is blood classified as?
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Connective Tissue
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Describe erythrocytes
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Biconcave, no nucleus (or organelles?) in mature form. Contains heme.
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hematocrit
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the estimated packed volume of RBCs in a person. Usually around 40-45% in men, 35-45% in women
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List the types of leukocytes
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Granular: neutrophils, eosinophils, basophils
Agranular: monocytes, lymphocytes |
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Neutrophil
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Granular leukocyte. Most common leukocyte (40-50%). Provide initial response to infection. Phagocytic (mainly bacteria) Highly motile. Multilobed nuclei (up to 5)
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Eosinophils
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Granular leukocyte(1-6%). Defend against parasites, and involved in allergic reactions. Phygocytic (antigen-antibody complexes) Granules stain red, often has bilobed nucleus.
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Basophils
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Granular leukocyte, least common (1%). Similar to mast cells. Release histamine, etc in response to allergy. Have dense granules.
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Monocytes
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Agranular leukocyte. Largest. 2-10%. Precursor to macrophages and osteoclasts. Have little function in blood (then differentiate in tissues)
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megakaryocytes
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Large, multinucleated cells within bone marrow. Pinch off pieces of themselves which become platelets (thrombocytes)
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Buffy coat
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leukocyte and platelet layer (1%)
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serum
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plasma minus fibrinogen
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Blood cell differential count
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Neutrophils: 40-75%
Lymphocytes: 20-50% Monocytes: 2-10% Eosinophils: 1-6% Basophils: <1% |
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Size of erythrocyte
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7 micrometers
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reticulocyte
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RBC with organelles (not fully mature)
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production of blood cells is called _______________
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hematopoiesis
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production of RBCs is ___________________
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erythropoiesis
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Production of basophils, eosinophils, neutrophils
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granulopoiesis
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Production of platelets
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Thrombopoiesis
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Megakaryocyte
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Sits at edge of sinuse and shakes off bits of plasma membrane to form platelets
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Stromal cell
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Supporting cell, under endothelium. Plays role in stem cell differentiation
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