The lymphatic system is a network of tubes that drains fluid from tissues and returns it to the bloodstream. Lymph nodes and organs like the spleen and thymus contain lymphocytes that help fight bacteria, viruses, and other pathogens. The main roles of the lymphatic system are to manage fluid levels in the body, respond to infections, and absorb fats from the intestine.

1. LYMPHATIC SYSTEM
BY – NIHARIKA VERMA

2. LYMPHATIC SYSTEM
 It is a network of delicate tubes through out the
body.
 It drains fluid (called Lymph) that has leaked from
the blood vessels into the tissue and empties it
back into the blood stream via the Lymph Node.
 The main roles of the Lymphatic System includes:
- Managing the fluid levels in the body.
- Reacting to bacteria.
- Absorbing some of the fats in our diet from the
intestine.
- Prevents from diseases/disorders.

3.  The lymph nodes and other lymphatic structures like
spleen and thymes holds special WBC called
Lymphocytes.
 These can rapidly multiply and release anti bodies in
response to bacteria, viruses.
 Main structure of the Lymphatic System
- Lymph
- Lymph nodes
- Lymphatic vessels
- Diffuse lymphoid tissue, example- tonsils
- Lymphoid organs  spleen (is the largest lymphatic
system organ)
 thymes

4.  Lymph – A fluid that contains WBC that defend against viruses
Pathogens.
 Lymph Vessels- That carry lymph throughout the body. They are
different from blood vessels.
 Lymph Nodes- Glands found through out the lymph vessels.
 Lymph nodes/lymph glands are part of the body immune system.
 They filter harmful substances.
 Lymph nodes are small lumps of tissue that contain WBC.
 They filter lymph fluid which is composed of fluid and waste
products from the body tissue.
 They also helps to activate immune system against infection.
 They are located throughout the body includes- Neck, Armpit,
Groin, Around Gut, Between the lungs.
 Cervical Lymph node (neck)
 Inguinal Lymph Node (groin)
 Axillary Lymph Node ( armpit)

5.  Spleen – It is the largest mass of lymphatic system
in the human body.
- It is located between fundus of the stomach and
diaphragm.
- It produces Antibodies.
- Keeps body fluid in balanced but it is possible to
live without it.
- Acts as a blood filter.
- Controls the amount of R.B.C and blood storage in
the body.
- When spleen detect bacteria, viruses, in the blood
then it produces W.B.C called – Lymphocyte.

6.  Thymes- It is a little – known organ.
- It is a part of Lymphatic System along with the toxins, a
denoids and spleen.
- Also part of the endocrine system.
- The thymes is located just below the breast bone
(sternum).
- It is relatively large in infants and grows until puberty.
- In adult hood is starts to slowly shrink and become
replaced by (bone) and with fat.
- The thymes produces progenitor cells.
- Which mature into T-cells. The body uses T cells help
destroy infected or cancerous cells.
-

7.  Progenitor cells- They act as a repair system for the
body.
- They are activated in case of tissue injury,
damaged or dead cells results recovery of the
tissue.
- Thymes gland produces hormones.
- Stimulates the production of T-cells.
- Assist in the development of B cells to plasma cells
to produce antibodies.

9.  Lymph Capillaries- Network of tiny thin walled
vessels called Lymphatic Capillaries.
- Lymphatic Capillaries - collects lymph fluid from
tissue which allows them to regulate the pressue of
Interstitial Fluid.
- Interstitial Fluid – also called tissue fluid, a solution
that batnes and surrounds the cell of multi-cellullar
animal.
- It contains water, electrolytes sugar, salt, hormone,
cell, wastes.
- It is the main component of Extra Cellular Fluid.
- Extra Cellular Fluid – Sodium Chloride

10.  Disorder-
1. Lymphoma- Also called Lymphatic Cancer.
- Occur at any age.
It is a type of blood cancer that develops when W.B.C
called Lymphocytes grow out of control.
Symptoms depends where the Lymphoma starts.