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Antibodies A Hinge
Region
E Antigen
Binding
FUNCTIONS: Site
-Work as flags for B
identifying antigens Variable
Region
-Prevent toxins from
entering cells D
Disulphide
C
Constant
-Attach to flagella to bridges
Region
slow bacteria down A-Flexibility
B-Specific shape. Ensures the correct antibody
-Neutralise toxins binds to the correct antigen
C- Enables antibody to attach to phagocytic
cells
D-Holds polypeptide chains together…read more

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Neutrophills (Phagocyte 1)
· Manufactured in bone marrow
· Have multi lobed nucleus
· Travel around the blood and squeeze in and
out of tissue fluid
· Released in large quantities as a result of an
infection
· Short lived…read more

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Macrophages (Phagocyte 2)
· Also formed in bone marrow
· Larger than neutrophills
· Travel in blood as monocytes
· Settle in organs (or Lymph nodes) to mature
· Kick off the immune response
· Cut up pathogens and display antigens
· Display of antigens help WBCs identify forgein
cells
· Long lived…read more

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Phagocytosis
Pathogen invades
body.
Infected cells
release Histamine
Neutrophills
INFLAMATION-
attracted and
>Capillaries
move towards
become leaky
pathogen
>More tissue fluid
Antibody receptor
Lysosome fuses attaches to
Swelling pathogen's
with vacuole and
More tissue fluid antibodies
Lysins released
in lymph nodes
Pathogen engulfed
Harmful parts
Pathogens led and becomes
digested and un-
towards trapped in vacuole
harmful parts used
macrophages…read more

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Lymphocytes
· Have a large nucleus
· Smaller than phagocytes
· Antigen specific
· Made in bone marrow before birth
· Can initiate immune response but only when
the cells are matured…read more

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