The lymphatic system is a network of organs, vessels and tissues that work together to move a colorless, watery fluid called lymph throughout the body. The lymphatic system protects the body from infection by destroying old, abnormal and damaged cells and filters the lymph fluid before returning it to the bloodstream. It also maintains normal fluid levels in the body and absorbs fats and fat-soluble vitamins from the intestines. Key organs of the lymphatic system include the spleen, thymus, bone marrow, lymph nodes and mucosa-associated lymphoid tissue found in the tonsils, airways and intestines. The lymphatic system functions to collect excess fluid from tissues, support fluid

1. THE LYMPHATIC
SYSTEM
SUBMITTED BY: ABDUL RAFAY

2. Content
LYMPH
LYMPHATIC SYSTEM
ORGANS OF LYMPHATIC SYSTEM
OTHER PARTS OF LYMPHATIC SYSTEM
FUNCTION OF LYMPHATIC SYSTEM

3. LYMPH
• Is is a colorless fluid
containing white blood
cells, which circulates
through the lymphatic
system.
3

4. Lymphatic system
• It is network of organs, vessels and tissues that work
together to move a colorless, watery fluid back into
circulatory system.
• It protects from infection and destroys old and
abnormal cells that body does not need.
• Its function also includes maintaining normal
fluid levels in body and absorbing fats and fat-soluble
vitamins.

5. Organs of lymphatic system
20XX
Spleen
This largest lymphatic organ is located
on left side under ribs and above
stomach.
Filters blood and removes cells that are
old or not working properly.
Keeps red blood cells and platelets
available in case body needs them.
Mucosa-associated lymphoid tissue
This mucus membrane exists
throughout body in many
locations.
Lines tonsils, airways, small
intestine and appendix.
Looks for and destroy germs.

6. Organs of lymphatic system
Bone marrow Thymus Lymph nodes
• Soft, spongy tissues
in center of certain
bones.
• Job of making white
blood cells, red blood
cells and platelets.
• Located in upper
chest beneath
breastbone, most
active before puberty.
• Its where t-cells fully
matured.
• Bean-shaped glands
that monitor and
cleanse lymph.
• Clear out damaged
cancer cells.
• Also stores
lymphocytes and
other immune cells.
• Person has above
600 lymph nodes
scattered throughout
body.

7. Other parts of lymphatic system
• Lymphatic vessels
Lymphatic vessels are tubes that form
a complex network
throughout body. The smallest tubes
are lymphatic capillaries, which
ultimately connect to larger tubes that
lead to two main ducts in upper
chest. The pulsing of nearby arteries
and squeezing of nearby muscles
help fluid move through lymphatic
vessels. These vessels contain one-
way valves that keep lymph moving
the right way.
• Collecting ducts
Two main ducts in upper
chest empty lymph into
subclavian veins. These are
right lymphatic duct and
thoracic duct. These ducts
are like highway on-ramps
or merging
points where lymph rejoins
bloodstream.
• Tonsils and adenoids
These structures trap pathogens
from the food you eat and the air
you take in. They’re part of body’s
first line of defense against
invaders. Tonsils are in the back of
throat. Adenoids are just behind
nasal cavity but are only active
during childhood
• Lymph
Also called lymphatic fluid is a
collection of extra fluid that drains
cells and tissues in body. Contains
many different
substances including proteins,
minerals, fats, damaged cells,
cancer cells and germs. Lymph
also transports infection-fighting
white blood cells (lymphocytes).

8. Function of
lymphatic
system
• Collecting excess fluid from body’s tissues and
returning it to bloodstream.
• Supports healthy fluid levels in body.
• Lymphatic system also filters out waste products and
abnormal cells from this fluid, helping body absorb fats.
• Most nutrients can travel through tiny openings (pores)
in the walls of capillaries, and body can then absorb and
use them, but certain fats and other molecules are too
large to travel in this way.
• Lymphatic system collects fluid from intestines that
contains these molecules and transports it back to
bloodstream, protecting body against invaders.
• Lymphatic system is part of immune system. It
produces and releases lymphocytes (a type of white blood
cell) and other immune cells.
• These cells look for and destroy invaders such as
bacteria, viruses, parasites and fungi that may enter body.

9. Thank you