T helper cell

This short animation shows how T helper cell, which is a small cell, and B cell, which is a large cell, are specialized in the immune response. The T helper cell is another type of lymphocyte that helps immune response to antigens. When both B lymphocyte and T helper cell recognize the same presence of specific antigen, the T helper lymphocyte is responsed by producing factors that assist the B cell's colone expansion. In addition, the T helper cell produce various secretions that signal other cells to multiply and attacks. Moreover, they also releases other factors that distract additional B lymphocyte and phagocytic cells. The animation relates to the part of chapter 16 which we have learn in our class is about the T lymphocytes and the Immune Response, such as helper T cells assist B cells in antibody production and assist cytotoxic T cells.
http://biology-animations.blogspot.com/2007/12/t-helper-cell-animation.html
In addition, there is the animation which I like is the " Cytotoxic T cell activity against target cells" animation, is posted by another student, Sirena Thomas. I like this animation because it helps me to understand how cytotoxic T cells interact with the virus-infected cells ,and which causes perforations in the cell membrane.