Summary
Summary Topic 6 Immunology
Edexcel Biology Topic 6 Immunology
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General Immunolog YBoremarrow stem cells -
Divide and
Non-specific Specific differentiate
S.I units Phagocytes Lymphocytes
Monocytes Neutrophils B-cells T-Killer T-helper
↓ & /
(macrophages) muhme
in Done mature in
marrow
thymus gland
neutrophil e
polymorph nucleocyte
↳
inflammatory response +
phagocytosis .
-found
170
in
%
he bloodstream
of WBC's
When have
you
are a
foetus you more
lymphocytes
some have
identified your own cells as
foreign and
they
are
↳
destroyed
winout have an autoimmune disease
you
-small number which increase when infected
of each lymphocyte
by
clonal expansion .
Immunity
Natural Passive -
Mother has antibodies which pass
through he placenta to he
foetus via
diffusion
↳ Also breast
in
feeding
doesn't have cells
Baby too
big
to
-
pass
memory
-
the plucenta
↳
throug n
no encounta with
antigen
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