大象传媒

Antigens and antibodies

Invading microorganisms have on their surface that the human body can recognise as being foreign - meaning not belonging to it.

When the body recognises a foreign antigen, lymphocytes (white blood cells) produce , which are complementary in shape to the antigen.

An antibody will only work on one type of microorganism because of this nature.

Antibodies microorganisms by clumping them together.

Immobilisation of the microorganism reduces symptoms and prevents the spread of infection.

The clump of microorganisms is then destroyed by

Phagocytosis is when a phagocyte (white blood cell) engulfs and digests the microorganisms.

within the phagocyte digest the microorganism.

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