Lecture 17 Blood Lymphatics Immune

Lecture 17 Blood Lymphatics Immune - Blood, Lymphatic and...

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Blood, Lymphatic and Immune Systems
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Blood (Hematopoetic) System Blood is composed of : 1. Cells - three types Red blood cells, platelets, white blood cells 2. Plasma - liquid component of blood Noncellular 92-94% water; Protein (Albumin, globulins) NOTE: If whole blood is allowed to clot, and is then centrifuged, the clear portion is SERUM. It differs from Plasma in that clotting factors have been “removed” to form the clot. Blood volume: Generally 8-10% of Body Weight
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Purple - platelets Orange - monocyte Green - T-lymphocyte
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Formed Elements of Blood Erythrocytes (red blood cells or RBCs) Red color is due to hemoglobin Heme(iron)-containing protein that binds oxygen Transport oxygen Anucleated in mammals In adults, RBC formation occurs in the red bone marrow
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Camelids have oval red blood cells
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Birds have oval, nucleated RBCs
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Formed Elements of Blood Platelets (thrombocytes) Fragments of megakaryocytes , large cells formed in the bone marrow Play an important role in blood clotting Reduce loss of blood from injured blood vessels by adhering to damaged blood vessel walls and to each other.
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Red blood cell, platelet, white blood cell
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Formed Elements of Blood White blood cells (leukocytes) Nucleated Capable of independent movement Classification: Granulocytes Neutrophils Eosinophils Basophils Agranulocytes Monocytes/macrophages Lymphocytes
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Leukocytes Neutrophils Highly phagocytic (eats cells) Migrate to any area invaded by bacteria Pass through the vessel walls, and engulf the bacteria First line of defense against infection Number increases whenever acute infection is present.
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Leukocytes Eosinophils Increase in number in case of chronic diseases such as infection with parasites and in allergic reactions Tend to dampen allergic reactions Basophils Contain blue-staining granules Rare in normal blood Contain heparin, histamine Enhance allergic reactions
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Monocytes Largest white blood cells Phagocytic like neutrophils
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This note was uploaded on 12/30/2011 for the course ANSC ANSC211 taught by Professor Black during the Fall '11 term at Maryland.

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Lecture 17 Blood Lymphatics Immune - Blood, Lymphatic and...

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