Which cell type is a subgroup of lymphocytes, abundant in the liver, and has important roles in innate immune protection against viruses, bacteria, parasites, and even tumor cells?

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Natural killer (NK) cells are a type of lymphocyte (a subgroup of white blood cells) that play a crucial role in the innate immune system. They are abundant in the liver and are known for their ability to recognize and kill virus-infected cells, bacteria, parasites, and tumor cells without the need for prior activation by specific antigens, distinguishing them from other lymphocytes such as T cells and B cells.

Which Cell Type Is a Subgroup of Lymphocytes, Abundant in the Liver