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Module 9 A&P
Blood
Term | Definition |
---|---|
Plasma | Clear extracellular matrix, accounts for 55% of blood |
Formed elements | Red blood cells account for most of the formed elements |
Hematocrit | percentage of red blood cells in a sample of blood; reveals how much oxygen the blood can carry |
Viscosity | term used to describe the thickness or stickiness of blood |
Hemopoiesis | Production of blood |
two types of hemopoetic tissue | Red bone marrow and lymphatic tissue |
red bone marrow | produces all types of blood cells |
lymphatic tissue | produces lymphocytes |
Red blood cells | (erythrocytes) deliver oxygen to blood cells, remove carbon dioxide |
Hemoglobin | a red pigment that gives blood its color |
iron | oxygen carrying component of hemoglobin |
red blood cell cycle life | 02 levels drop, kidneys secrete erythroportin, bone marrow creates erythrocytes, reticulocytes released, 02 rises,EPO and RBC go down |
Reticulocytes | immature RBCs |
Hemoglobin | globin and heme |
globin | amino acids |
heme | iron and bilirubin |
iron is transported to bone marrow... | to create new hemoglobin |
when destruction of red blood cells become excessive (hemolysis)... | the body cant readily assimilate the increased amounts of bilirubin causing jaundice |
White blood cells | called leukocytes, fewest of elements formed |
Eosinophils | involved in allergenic reactions, elevated in allergic reactions |
Agranulocytes | has longestest life span (can live years), |
Lymphocytes | responsible for long term immunity |
leukemia | extremely high WBC |
Leukopenia | Low WBC |
Platelets | thrombocytes |
steps of hemostasis | vascular spasm, formation of platelet plug, formation of blood clot |
Hemostasis | formation of blood clot |
synthesis of clotting factors requires... | vitamin K |
Fibrinolysis | the process of clot dissolution |
agglutinate | RBC clump together cause by reaction |
Majority of americans have | RH positive blood |