T-helper cell lymphocyte

I like this animation because it shows very clear how T-helper cells which are lymphocytes aid in immune respose. When a B-lymphocyte and T-helper cell recognize the same antigen, they produce factors that assist in clonal expansion. After that, the T-helper cell releases factors that attract additional B-lymphocytes and phagocytic cells. This animations relates to Chapter 16 of the textbook were we learned in class about the T lymphocytes and the immune response.