The lymphatic system is part of the immune system and consists of a network of lymphatic vessels and lymph nodes throughout the body, except in certain areas like the central nervous system, cornea, and bones. Lymph is interstitial fluid that circulates through lymphatic vessels from tissues to lymph nodes and eventually returns to the bloodstream at the subclavian veins. The lymphatic system helps return protein to the bloodstream, redistribute body fluids, remove foreign substances, and plays an important role in immunity by transporting lymphocytes between tissues and lymph nodes.

1. LYMPHATIC SYSTEM
LYMPH

2. LYMPHATIC SYSTEM
A part of immune system comprising a network of lymphatic
vessel & lymphatic node in all major tissues of body .
It is absent in CNS , cornea , superficial layer of skin , bones ,
alveoli of lungs .

4. COMPONENTS OF LYMPHATIC SYSTEM
Components of
Lymphatic
system
LYMPH
Lymph
Vessel
Lymph
Nodes
Lymph
Organs
Bone
Marrow

6. LYMPH
Interstitial fluid that circulates through Lymphatic vessel .
Clear , Colorless fluid similar to blood plasma but low in
protein .
Origin of Lymph : It originate in microscopic Vessel called
Lymphatic capillaries .
When blood pass thro’ blood capillaries in the tissues , then
* 9/10 of fluid -> Venous end
* 1/10 of fluid -> Lymph capillaries
Chyle Lymph from small intestine .

8. FLOW OF LYMPH
Blood capillaries ( blood )
Interstitial space ( Interstitial fluid )
Lymphatic capillaries ( Lymph )
Lymphatic afferent Vessel ( lymph )
Lymph node ( lymph )
Lymphatic efferent vessel ( lymph )
Lymphatic trunk
Thoracic duct Right lymphatic duct
Junction of Internal jugular & Subclavian vein
Venous Blood

10. RATE OF FLOW OF LYMPH :
 120 ml of lymph flow into blood per hour .
 100 ml / hr  Thoracic duct
 20 ml / hr  Right lymphatic duct
Factors Increasing flow of lymph :
 Interstitial fluid pressure
 Blood capillary pressure
 Permeablity of lymph capillary
 Surface area of lymph capillary

11. FUNCTION OF LYMPH :
Return of protein
Redistrbution of body fluid
Remove foreign bodies
Maintenance of structural & functional integrity of
tissues.
For intestinal fat absorption
Play a imp. role in immunity by transport of
lymphocytes.

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