بافتها و اعضاء سيستم لنفاوي Lymphoid Organs 1 Primary (Central) Lymphoid OrgansPrimary (Central) Lymphoid Organs (Lymphocytes are generated) Bone MarrowBone Marrow ThymusThymus

Primary (Central) Lymphoid Organs  مغز استخوان Bone Marrow  در سنين پايين در همه استخوانها  در سنين بالا در استخوانهاي دراز از بين مي رود  محل بلوغ لنفوسيتهاي B است  تيموس Thymus  در سنين پايين فعال است و در سن بالا تحليل مي رود  محل بلوغ لنفوسيتهاي T است

Thymus small in an adult site of T lymphocyte production secretes thymosins 16-14

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Secondary (Peripheral) Lymphoid Organs Lymphatic Vessels & Capillaries (Lymphatic Vessels & Capillaries ( Lymphatic System ) Lymph nodesLymph nodes SpleenSpleen Lymphoid tissues associated with mucosaLymphoid tissues associated with mucosa 1.Gut associated Tonsils, 2.Peyers Patches 3.Appendix 4.Lymphoid Follicles (Bronchial-Associated Lymphoid Tissue (BALT), Mucosal-Associated Lymphoid Tissue (MALT)

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Lymph Function Absorption of dietary fats & transports fats to bloodstream Delivers foreign particles to lymph nodes Network of vessels that assist in circulating fluids Transports excess fluid away from interstitial spaces Transports fluid to the bloodstream Help defend the body against diseases

Lymphatic Pathways

Lymph Movement action of skeletal muscles respiratory movements smooth muscle in larger lymphatic vessels valves in lymphatic vessels

Lymphatic Capillaries microscopic closed-ended tubes in interstitial spaces of most tissues

Tissue Fluid and Lymph Lymph tissue fluid that has entered a lymphatic capillary

Lymphatic Vessels Lymphatic vessels merge into lymphatic trunks lymphatic trunks drain into collecting ducts

Thoracic duct Right lymphatic duct Lymphatic Ducts

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Lymph Nodes

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Lymph Nodes cervical region axillary region inguinal region pelvic cavity abdominal cavity thoracic cavity supratrochlear region 16-12

Functions of Lymph Nodes filter potentially harmful particles from lymph immune surveillance by macrophages and lymphocytes areas of lymphocyte production 16-13

Spleen largest lymphatic organ upper left abdominal quadrant sinuses filled with blood white pulp lymphocytes red pulp red blood cells lymphocytes macrophages 16-15

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