Summary
Summary AQA ALEVEL BIOLOGY ON WHITE BLOOD CELLS
- Course
- Institution
ALEVEL NOTES ON THE IMMUNITY TOPIC- WHITE BLOOD CELLS ADJUSTED TO THE AQA SPECIFICATION AND MADE FROM MARKSCHEMES
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White Blood Cells=
If fail the
-
the
physical or chemical barriers , next line of defence are white blood cells .
'
Kember in humans ,
our blood is made of :
,
blood cells Oz )
↳ Red ( contains
hemoglobin which carries
↳ white blood cells ( see below
)
↳ platelets ttrevents bleeding by forming dots
↳ Plasma lliquid that carries blood cells and proteins)
white blood cells also leukocytes
called they protect
'
are -
illness disease
against and .
you
-
White blood cells are made in the bone marrow and are
the blood and tissues
stored in
lymph
.
Types of white Blood cells
, deer - -
r - or #
1 .
Monocytes -
they have a
longer lifespan than
many
white
blood cells and to break down bacteria
help .
2- Neutrophils -
kill and
digest bacteria and fungi through phagocytosis .
They are
the most of white blood cell
numerous
type .
3 .
Basophils -
Sounds an alarm when infectious agents invade
your
blood .
They secrete chemicals
such histamine marker of allergic disease that help c.ontrol the
body 's immune
as ,
a ,
system .
kill
4 .
Eosinophils -
They attack and parasites and , cancer cells ,
and help with
allergic responses .
5.
Lymphocytes
-
create antibodies to
fight against bacteria ,
viruses and other
potentially
harmful invaders .
What is a
phagocyte ?
A of out
phagocyte
is type white blood cell that carries
phagocytosis
✓
a .
found blood and in first
Phagocytes are in the tissues and are the cells
.
to
respond to an immune system trigger inside a
body .
Different types of Phagocytes
Macrophages
}
1
come from
.
cells
monocytes
2 .
Dendritic
3. Neutrophils
Macrophages cells involved in the detection phagocytosis and
'
are ,
destruction of bacteria and other harmful organisms .
Dendritic main function material and
cell 's is to
process antigen
-
present it on the cell surface to the
of the
T
lymphocytes immune
system
-
.
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