Lymphatic System

 

 
10.7 Lymphatic System
 
  • Lymphatic system is a part of blood circulatory system and immune system.
  • High blood pressure from the capillaries bed causing the water and dissolved substances to diffuse into the interstitial space. 
  • 90% of interstitial fluid will be passed into the blood capillaries and veins. 
  • 10% of interstitial fluid will be passed into the blood circulatory system through lymphatic system.
 

Roles of lymphatic system in transportation:

  • Transport the excess of interstitial fluid back into the blood before they enter the heart. 
  • Lacteal in the small intestine absorb fatty acids and glycerols, 
  • Transport enzymes and hormones. 
  • Cholesterol enters the blood circulatory system through the lymphatic system. 
  • Transport nutrients and waste back into the blood circulatory system.
 

The components of lymphatic system:

  • Lymph capillaries. example: lacteal.
  • Lymph vessels; contain valves. 
  • Lymph duct; transport lymph into the blood circulatory system through subclavian vein. example; thoracic duct and right lymphatic duct.
  • Lymph nodes; filter the lymph; contain two types of leucocytes such  phagocytes and monocytes.
  • Lymph organs; spleen, tonsil, thymus gland, appendix and bone marrow.