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18 Cards in this Set
- Front
- Back
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3 parts to the
cardiovascular system |
blood
heart vessels |
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blood tissue
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connective tissue:
very few cells lots of extracellular matrix circulation connects many organs |
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blood composition
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55% plasma
45% formed elements |
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formed elements
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RBC - erythrocytes
WBC - lymphocytes platelets - thrombocytes |
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roles of blood
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transportation
regulation protection |
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4 transporting roles of blood
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transports:
> oxygen & CO2 between lungs & cells > nutrients from GI tract to cells > waste from cells > hormones from endocrine glands to body cells |
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4 regulatory roles of blood
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> reservoir of fluids to keep the body's fluid levels balanced
> ph has a buffering quality - ability to convert strong acids or bases into weaker ones > body temp - heat absorbing and coolant capacity of H2O in blood > contributes or takes away water from cells |
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4 protective roles of blood
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> limits blood loss through clotting
> WBC combat toxins and microbes > phagocytosis - ingestion & destruction of microbes, cell debris & foreign matter > production of antibodies, interferons & complement |
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5 physical characteristics of blood
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> viscosity greater than water
> 38'C / 100.4'F > ph 7.35 - 7.45 > 8% of body weight > volume of 4-6 liters |
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plasma
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blood without the formed elements
91.5% water 8.5% solutes (7% is plasma proteins) |
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components of plasma
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1- water
2- albumins 3- globulins 4- fibrinogen 5- electrolytes 6- nutrients 7- gases 8- regulatory substances 9- waste |
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hemopoiesis
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production of formed elements of blood
(RBC, WBC, platelets) |
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erythropoeitin
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hemopoietic factor to increase erythtocytes (RBC)
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physical characteristics of erythrocytes
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5.4 million cells/microliter of blood
biconcave disc no nuclei contains hemoglobin |
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formation of red blood cell
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pluripotent stem cell
myeloid stem cell - erythropoietin proerythroblast reticulocyte erythrocyte (RBC) |
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formation of platelets
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pluripotent stem cell
myeloid stem cell - thrombopoietin megakaryoblast megacaryocyte thrombocyte (platelet) |
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formation of white blood cell
(granular leukocytes) |
pluripotent stem cell
myeloid stem cell - cytokines myelobast, eosinophilic myeloblast or basilic myeloblast neutrophil, eosinophil or basophil |
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formation of white blood cells
(agranular leukocytes) |
pluripotent stem cell
myeloid or lymphoid stem cell - cytokines monoblast or lymphoblast monocyte or lymphocyte macrophage or B cell, T cell |
