Bursa/Bone Marrow-Derived Cells (B cells ... What are the 2 hallmark events of B cell development in bone marrow? 1. ... ONLY in humral immune responses to ...
Natural killer cells or NK cells are a type of cytotoxic lymphocyte critical to the innate immune system. The role NK cells play is analogous to that of cytotoxic T cells in the vertebrate adaptive immune response. NK cells provide rapid responses to viral-infected cells, acting at around 3 days after infection, and respond to tumor formation.
The other main type of T-cells are called helper T-cells. Helper T-cells orchestrate an immune response and play important roles in all arms of immunity. You can find out more about these cells using the links to the right.