Mass of lymphatic tissue in the nasopharynx

Portection

Provides immunity in fetal life, makes cells immunocompetent

Protein produced by B cells to destroy antigens

Lymph

malignant tumor of the lymph nodes

Ability to recognize and remember specific antigens and mount an attack on them

Lymph node

inhibit viral enzyme called reverse transcriptase.

T-cells that respond to antigens and destroy them

Thymus gland

recognize and digest foreign antigens. Present antigens on the surface to stimulate B and T cells.
They transfer immunity by exposing dendritic cells in culture; then transfuse them and get them to stimulate T and B cells.

Antibodies secreted by plasma cells in response to the presence of an antigen

Poison

cell mediated immunity