HSC 215 Lecture Notes - Lecture 11: Blood Plasma, Hemostasis, Red Blood Cell
Document Summary
Consists of three types of specialized cellular elements suspended in plasma (liquid portion of blood: formed elements, erythrocytes. Important in hemostasis (clot, prevent the blood from moving, prevent: platelets blood loss, liquid matrix: Plasma proteins: immunoglobulin"s-antibodies, fibrinogen and prothrombin blood clotting, albumins- maintain osmotic pressure in blood. Notes: occurs in red bone marrow /myeloid tissue begins with stem cell. Details of formed elements: red blood cells (rbcs) Oxyhemoglobin =rbs sarturaetd with oxygen: globin portion. Protein composed of four highly folded polypeptide chains. Five different types of circulating leukocytes: neutrophils, eosinophils, basophils, monocytes, lymphocytes. 1st at scene of injury: eosinophils- parasitic worms and allergies, basophils- masts cells contain histamine, agranulocytes, monocytes: phagocytes/macrophages, lymphocytes: immunity. Functions/abilities of wbcs: emigration/diapedesis: movement of wbcs through vessel walls, chemotaxis: movements of wbcs towards chemical signals, phagocytosis: cell engulfing, immunity/antibody production: bind with foreign invaders, platelets: thrombocytes. Structure: formed within the myeloid tissue from large cells called megakaryocytes in response to thrombocytes.
