Phagocytes engulf pathogens
A phagocyte recognises the antigens on the pathogen
Cytoplasm moves round it
Phagocytic bubble frms
Antigens stick to other cells and active them.
Phagocytes activate T lymphocytes
White blood cell
Antigens have receptors
T lymphocyte has a complementary antigen
Helper T cells release substances to activate B lymphocytes
T lymphocytes activate B lymphocytes which divide
Antibodies bind with antigens to form antibodie-antigen complex.
B lymphocyte meets a complementary antigen substances from T lymphocye activate the B lymphocyte.
B lymphocte divides by mitosis into plasma and memory cells
Plasma cells make more antibodies to a specific an
Clones of B lymphocytes
Antigen- antibodie complexes.