Which type of lymphocyte attacks and destroys infected body cells?

Killer T-cells, also known as cytotoxic T lymphocytes, play a crucial role in the immune response by directly attacking and destroying infected body cells. These cells recognize infected or cancerous cells through specific antigens presented on their surface and subsequently release substances that create holes in the membranes of these cells, leading to their destruction.

B-cells are primarily responsible for producing antibodies that target pathogens in the bloodstream, while Helper T-cells assist in orchestrating the immune response by activating other immune cells. Memory B-cells are formed after an initial infection and help the body respond more quickly upon future exposure to the same pathogen. Each of these cell types has a distinct function within the immune system, but it is the Killer T-cells that specialize in the direct elimination of infected cells.