chapt21 v0804 Immunity

chapt21 v0804 Immunity - Chapter 21 Lymphatic and Immune...

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1 Maintain fluid balance Protect body from infection and disease Chapter 21 Lymphatic and Immune Systems
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2 1.) Immunity fluids from all capillary beds are filtered immune cells stand ready to respond to foreign cells 2.) Lipid absorption Lacteals in small intestine absorb dietary lipids 3.) Fluid recovery absorbs plasma proteins and fluid from tissues and returns it to the bloodstream interference with lymphatic drainage leads to severe edema 3 Functions of Lymphatic System
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3 Lymphatic Obstruction Elephantiasis- mosquito-borne infection effect the skin to cause it to thicken. Also, the scrotum of men and breasts of women are similarly effected.
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4 Lymph and Lymphatic Tissue Lymph clear, colorless fluid, similar to plasma Lymph is like blood in the vascular system This fluid flows within lymphatic vessels Lymphatic tissue is specialized connective tissue that contains lymphocytes
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5 Route of Lymph Flow Lymphatic vessels are vein-like, have valves and go along the course with arteries and veins Lymphatic vessels permits interstitial fluid to flow in and out The flow - Lymphatic capillaries to: Lymphatic vessels to: Lymph nodes.
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6 Valve in a Lymphatic Vessel Why valves?
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7 Lymphatic Drainage of Mammary and Axillary Regions Drainage of Right side of the body: Right lymphatic duct to: Right subclavian
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8 Drainage of Thorax Drainage of the Left side of the body: Cisterna Chyli to Thoracic Duct to Left Subclavian vein.
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9 4 Mechanisms of Lymph Flow 1.) Moved along by rhythmic contractions of lymphatic vessels 2.) Flow aided by skeletal muscle pump 3.) Thoracic pump aids flow from abdominal to thoracic cavity Valves prevent backward flow 4.) Rapidly flowing bloodstream in subclavian veins, draws lymph into it Exercise significantly increases lymphatic return
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10 Lymphatic Cells T lymphocytes Mature in T hymus B lymphocytes Mature in B one marrow Secondary lymphatic organs- sites where the B and T cells carry out the immune response Lymph nodes Spleen
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11 Lymphatic Organs At well defined anatomical sites. Lymph nodes cervical, axillary and inguinal regions close to surface thoracic, abdominal and pelvic groups deep in cavities Tonsils guard entrance to pharynx Spleen inferior to diaphragm on the left Thymus behind sternum
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12 Thymus Gland Thymus gland is located posterior to the sternal angle Thymus gland produces T cells The thymus may not become atrophied as we age
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13 Lymph Node Lymph Nodes- approximately 600 bean shaped nodes in the body Lymph nodes - only organs that
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This note was uploaded on 09/25/2011 for the course BSC 1085 taught by Professor Staff during the Fall '09 term at Broward College.

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chapt21 v0804 Immunity - Chapter 21 Lymphatic and Immune...

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