BIOLOGY CLASSWORK
NAME: Camila Pozo
DATE: 05/19/2021
TOPIC: Immune system
TEACHER: Andrea Ruiz
Body systems
IMMUNE SYSTEM
The immune system is the group of
organs that are in charge of
protecting our body from pathogens
that provoke illnesses in order to
maintain the stability of the body
functions, also known as
homeostasis, defense against tumor
cells, destruction of abnormal or
dead cells, defense against microbes.
Cardiovascular system
LINES OF DEFENSE
VIRUSES AND BACTERIAS
ORGANS AND CELLS
THAT COMFORM THE
IMMUNE SYSTEM
FIRST
SECOND
SKIN: Epidermis form a
shield and also secretes
chemicals in order to kill
the invaders.
MUCUS & CILIA: When
mucus become stuck,
hair-like structures
called cilia are in charge.
SALIVA: It contains many
chemicals that kill
bacteria, however, many
of those bacteria can
survive
STOMACH ACID: When
bacteria enter to your
stomach, it is broken
down with the same
chemicals that break
down the food you eat.
WHITE BLOOD CELLS
(WBC): When WBC
detect invaders, they
enter the body tissues
in order to attack
them.
PHAGOCYTES: They
are responsible to
break down those
invaders in lysosomes
Both of them are considered
invaders that causes diseases
Viruses and bacteria are transmitted
by vectors such as air, in water, or in
food.
To treat the diseases caused by them
there are different ways, for example
antibiotics and vaccines.
While bacteria is considered a living
organism, viruses are not
ORGANS
CELLS
Tonsils
Thymus
Lymph nodes
Spleen
Payer’s patches
Appendix
Lymphatic vessels
Bone Marrow
LYMPHOCYTES: T-
lymphosytes, B-
lymphosytes,
plasma cells,
natural killer
lymphosytes
Monocytes,
macrophage
GRANULOCYTES:
Neutrophils,
Eosinophils,
Basophils