Lymphatic System. Lymphatic System: Overview -Consists of two semi-independent parts Meandering...
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Transcript of Lymphatic System. Lymphatic System: Overview -Consists of two semi-independent parts Meandering...
![Page 1: Lymphatic System. Lymphatic System: Overview -Consists of two semi-independent parts Meandering network of lymphatic vessels Lymphoid tissues and organs.](https://reader036.fdocuments.in/reader036/viewer/2022062518/5697bf9a1a28abf838c9217e/html5/thumbnails/1.jpg)
Lymphatic System
![Page 2: Lymphatic System. Lymphatic System: Overview -Consists of two semi-independent parts Meandering network of lymphatic vessels Lymphoid tissues and organs.](https://reader036.fdocuments.in/reader036/viewer/2022062518/5697bf9a1a28abf838c9217e/html5/thumbnails/2.jpg)
Lymphatic System: Overview
- Consists of two semi-independent parts• Meandering network of lymphatic vessels
• Lymphoid tissues and organs scattered throughout body
- Returns interstitial fluid and leaked plasma proteins back to the blood
- Lymph – interstitial fluid once it has entered lymphatic vessels
![Page 3: Lymphatic System. Lymphatic System: Overview -Consists of two semi-independent parts Meandering network of lymphatic vessels Lymphoid tissues and organs.](https://reader036.fdocuments.in/reader036/viewer/2022062518/5697bf9a1a28abf838c9217e/html5/thumbnails/3.jpg)
Introduction– Components
• Lymph is the fluid
• Vessels – lymphatics
• Structures & organs
– Functions• Return tissue fluid to the bloodstream
• Transport fats from the digestive tract to the bloodstream
• Surveillance & defense
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The Lymphatic System
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Lymph Fluid and Movement
- Once interstitial fluid in cardiovascular system leaves capillaries and enters lymph capillaries, fluid is called “lymph fluid”
- Movement- Contraction of skeletal muscles against lymphatic
vessels
- Smooth muscle contraction
- Valves in lymphatic vessels
- Breathing
- Obstruction of system leads to edema
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Lymphatics– Originate as lymph capillaries– Capillaries unite to form larger vessels
• Resemble veins in structure• Connect to lymph nodes at various intervals
– Lymphatics ultimately deliver lymph into 2 main channels
• Right lymphatic duct– Drains right side of head & neck, right arm, right thorax– Empties into the right subclavian vein
• Thoracic duct– Drains the rest of the body– Empties into the left subclavian vein
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Lymph Capillaries
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Lymphatic Vessels
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Main Channels of Lymphatics
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Major Lymphatic Vessels of the Trunk
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Lymph Tissue– 3 types
• Diffuse lymphatic tissue– No capsule present– Found in connective tissue of almost all organs
• Lymphatic nodules– No capsule present– Oval-shaped masses– Found singly or in clusters
• Lymphatic organs– Capsule present– Lymph nodes, spleen, thymus gland
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Lymph Nodules