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21 Cards in this Set

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