The immune system defends the body against germs and microorganisms through specialized cells, proteins, tissues, and organs. It is made up of two types of white blood cells - phagocytes that destroy invading organisms, and lymphocytes that remember and help destroy previous invaders. The immune system has three lines of defense - T cells, macrophages, and B cells. It provides innate, adaptive, and passive immunity. Disorders can include asthma, eczema, and susceptibility to frequent infections.

1. IMMUNE SYSTEM
HALA OMAR AL-WASEM
MONIRA N. AL-DABBOUS

2. IMMUNE SYSTEM
The immune system, which is made up of
special cells, proteins, tissues, and organs,
defends people against germs and
microorganisms every day. In most cases, the
immune system does a great job of keeping
people healthy and preventing infections. But
sometimes problems with the immune system
can lead to illness and infection.

3. IMMUNE SYSTEM FUNCTION :
The main function of the immune
system is defense against diseases
( microbial infection )

4. IMMUNE SYSTEM ORGANS
• Lymphatic vessels • Tonsils
• Thymus • Bone narrow
• Spleen • Appendix
• Lymph nodes • Skin

5. LYMPHATIC VESSELS
Transport lymph to the immune
system organs and into the blood
stream

6. THYMUS
Is responsible for direction and
the maturation of immature
thymocytes into T-cells

7. SPLEEN
Filters the blood and
destroy old blood vessels
SPLEEN

8. LYMPH NODES
Filter the lymph and the antigens
out of the lymph if it collected in

9. SKIN
It provides natural immunity by
providing a barrier that keeps out
harmful materials

10. TONSILS
Destroy bacteria and germs that we
swallow

11. BONE MARROW
Produce the blood cells and most
immune cells which called stem cells

12. APPENDIX
The cells in it protect us from the
good bacteria

13. WHITE BLOOD CELLS
• The cells involved are white blood cells,
or leukocytes, which come in two basic
types that combine to seek out and
destroy disease-causing organisms or
substances.

14. LEUKOCYTES
Leukocytes are produced or stored in many
locations in the body, including the
thymus, spleen, and bone marrow. For this
reason, they're called the lymphoid organs.
lymph nodes, that house the leukocytes. They
circulate through the body between the organs
and lymphatic vessels and blood vessels. In this
way, the immune system works in a coordinated
manner to monitor the body for germs or
substances that might cause problems.

15. THE 2 BASIC PARTS OF
LEUKOYCYTES
Phagocytes, cells that chew up invading
organisms
Lymphocytes, cells that allow the body to
remember and recognize previous invaders
and help the body destroy them

16. NEUTROPHIL
Another type of cells that are
involved in the immune system
which fights bacteria and it
actually considered as
phagocytes

17. THE 3 DEFENSE SYSTEM
T Cells
Macrophage cells
B Cells

18. T-CELLS
A T-cell is a type of blood cell. T-cells belong to
a group of white blood cells (WBCs) called
lymphocytes. WBCs protect the body from
infection.

19. B-CELLS
A type of white blood cell called “lymphocyte”.
They mature into plasma cells that produce
antibodies (proteins) to fight off infections

20. MACROPHAGE CELLS
Is a type of white blood cells remove bacteria
that can build up in the lungs and cause
infection.

21. COMPLEMENT
They are a group of proteins that are
also part of the immune system.
Complement assists in killing
bacteria, viruses, or infected cells.

22. IMMUNITY
Humans have three types of immunity
INNATE
ADAPTIVE
PASSIVE

23. INNATE
Everyone is born with innate (or
natural) immunity, a type of
general protection.

24. ADAPTIVE
The second kind of protection is adaptive
(or active) immunity, which develops
throughout our lives. Adaptive
immunity involves the lymphocytes and
develops as people are exposed to
diseases or immunized against diseases
through vaccination.

25. PASSIVE
Passive immunity is "borrowed" from another
source and it lasts for a short time. For
example, antibodies in a mother's breast milk
provide a baby with temporary immunity to
diseases the mother has been exposed to. This
can help protect the baby against infection
during the early years of childhood.

26. DISORDERS OF THE IMMUNE
SYSTEM
Asthma, a respiratory disorder that can cause
breathing problems, frequently involves an
allergic response by the lungs. If the lungs are
oversensitive to certain allergens (like
pollen, molds, animal dander, or dust
mites), it can trigger breathing tubes in the
lungs to become narrowed, leading to
reduced airflow and making it hard for a
person to breathe.

27. Eczema is an itchy rash also known as atopic
dermatitis. Although atopic dermatitis is not
necessarily caused by an allergic reaction, it
more often occurs in kids and teens who have
allergies, hay fever, or asthma or who have a
family history of these conditions.

28. Everyone's immune system is different. Some
people never seem to get infections, whereas
others seem to be sick all the time. As people
get older, they usually become immune to
more germs as the immune system comes into
contact with more and more of them. That's
why adults and teens tend to get fewer colds
than kids — their bodies have learned to
recognize and immediately attack many of
the viruses that cause colds.