THE IMMUNE SYSTEM - PowerPoint PPT Presentation

1 / 20
About This Presentation
Title:

THE IMMUNE SYSTEM

Description:

cancer cells and cells infected with viruses. Cells of the Immune Response, continued... therefore, many people are able to have their tonsils removed ... – PowerPoint PPT presentation

Number of Views:43
Avg rating:3.0/5.0
Slides: 21
Provided by: wayz
Category:
Tags: immune | system | the | cancer | famous | people | with

less

Transcript and Presenter's Notes

Title: THE IMMUNE SYSTEM


1
THE IMMUNE SYSTEM
2
BACKGROUND
Your immune system special cells that are
"programmed" to protect your body from
disease-causing microbes (viruses,parasites,bacter
ia,and fungi).
In order to do this successfully, your body must
be able to recognize "self" and "nonself."
3
The Immune Response
FOUR PHASES OF RESPONSE
1. recognizing the enemy
2. activating the defense system
3. winning the battle
4. restoring the system to its normal state
4
Cells of the Immune Response
NATURAL KILLER CELLS..
..large white blood cells ..attack infected
cells, not the pathogen (Usually destroying
healthy cells, also)
Natural killer Cells are very effective in
killing cancer cells and cells infected with
viruses.
5
Cells of the Immune Response, continued...
Macrophages
rid the body of worn out cells and cellular
debris
consume and destroy any pathogens they encounter
Alerts Immune Response
release chemicals (INTERLEUKIN) that calls
T-cells to help fight invaders 
6
Cells of the Immune Response, continued...
T-Cells
--gtHelper T-Cell
helps stimulate B cell production
--gtKiller T-Cell
Kills cells that are cancerous or infected by
invader
Killer T-cells attack pathogens by injecting
proteins into its cell membrane. The proteins
allow fluids to leave cell and the cell bursts.
--gtSuppressor T-Cell
Slows or stops B-cell and T-cell activity once
infection or danger has passed
7
Cells of the Immune Response, continued...
B-Lymphocyte (B-cell)
Cells that mature in bone marrow and are the
producers of ANTIBODIES
Protein shaped like a Y that binds to
Pathogens to help destroy it or by
identifying it for other cells to destroy 
capable of "remembering" the identity of
foreign proteins
8
(No Transcript)
9
Bone Marrow
All cells of the immune system originate in
the bone marrow.
The function of the bone marrow is the
production of blood cells (white blood cells,
red blood cells, and platelets).
10
Tonsils Adenoids
located near the entrance of your breathing
passages
THEORY catch incoming germs trying to enter the
body through the mouth or nose.
The tonsils seem to do most of its work during
the first few years of a child's life
therefore, many people are able to have their
tonsils removed without experiencing any loss in
their immune function.
11
The Spleen
..filter the blood and trap pathogens
12
Appendix
No known function.
However, Bacteria is present in large amounts in
the intestine,therefore the location of the
appendix is ideal for destroying these
microorganisms before they are able to break
through the intestinal wall.
13
Lymph Nodes
in neck, groin and armpits, also scattered all
along lymph vessels.
act as filters and destroy toxins and germs
(like bacteria, viruses) before they enter the
bloodstream.
14
Thymus
Immature T-cells leave the bone marrow and go
into the thymus where they mature.
mature T cells are then released into the
bloodstream when needed
15
Peyer's Patches
consist of B cells and helps fight infection.
16
EDWARD JENNER
He was the cowpox--gtsmallpox dude..
Check out the below site..
http//www.jennermuseum.com/
17
Immunization
Some famous faces
Louis Pasteur
Developed a vaccine for anthrax by heat
treating the bacteria - tested on sheep.
Developed a vaccine for rabies in 1885
First tested on a small boy after he was
bitten by a dog
18
Some famous faces, continued
Jonas Salk
Developed the polio vaccine around 1955
discovered 3 viruses that caused polio.
injected the dead viruses into animals
tested it on his family and later on a large
group of children
they all developed an immunity against polio
19
(No Transcript)
20
Rejection..
..of donor organs remains one of the current
challenges.
QUESTION Why would your body reject a needed
organ?
Unless the new organ is a very close blood match,
your immune cells see the new organ as a
non-self invader!
Write a Comment
User Comments (0)
About PowerShow.com