An Introduction HEMATOLOGY HEMATOLOGY 1 a Without references
- Slides: 13
An Introduction HEMATOLOGY
HEMATOLOGY 1 a. Without references identify basic facts and terms about hematology with a minimum of 70% accuracy. (1) Hematology (2) Circulatory System (3) Origins of Blood Cells (4) Hematological Diseases (5) Specimens for Hematology
HEMATOLOGY Branch of medicine that studies blood cells and blood-forming tissue Includes hemostasis (the process of stopping bleeding) Tests can detect diseases such as Anemia Leukemia Hemophilia
Circulatory System Circulation Blood circulates from the heart to the lungs to pick up O 2 Oxygenated blood returns to the heart to be pumped out to the tissues O 2 is exchanged for CO 2 in the tissues Blood returns to the heart and lungs to release the CO 2 by exhaling http: //www. youtube. com/watch? v=AB
Types of Vessels Arteries- Carry blood with O 2 (excluding pulmonary artery) Veins- Carry blood with CO 2 (except for pulmonary vein) Capillaries- Smallest blood vessel (point of gas exchange
Composition of Blood Volume - approximately 5 liters in an adult Components (mostly water) Plasma – 50 -60% of blood volume; mostly H 2 O with proteins, carbohydrates, lipids, hormones and antibodies X 5
Cellular Elements Erythrocytes (RBCs) major function - transport O 2 and CO 2 life span - 120 days Leukocytes (WBCs) major function - provide immunity and defense against infection, (5 types)
Cellular Elements Thrombocytes (platelets) major function – hemostasis life span - 10 days
Origins of Blood Cells Hemopoiesis - formation and development of blood cells Liver (fetus) Bone marrow (adults) – blood cells mature in marrow and are released into circulation
Hematological Diseases Leukemia – overproduction of WBCs Anemia – decreased number of RBCs Thrombocytopenia – decreased number of platelets Polycythemia – increased number of all types of blood cells Inherited diseases – hemophilia and sickle cell
Specimens for Hematology Capillary and venous blood used Complete Blood Count Specimen of choice – whole blood with EDTA anticoagulant Coagulation testing Specimen of choice – whole blood with sodium citrate anticoagulant
HEMATOLOGY 1 a. Without references identify basic facts and terms about hematology with a minimum of 70% accuracy. (1) Hematology (2) Circulatory System (3) Origins of Blood Cells (4) Hematological Diseases (5) Specimens for Hematology
Introduction of hematology
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