Question

define what is T-cells

Answer 1

T cell is a type of lymphocyte (a subtype of white blood cell) that plays a central role in cell-mediated immunity. T cells can be distinguished from other lymphocytes, such as B cells and natural killer cells, by the presence of a T-cell receptor on the cell surface.

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Answer 2

Explanation:

Cell, in biology, the basic membrane-bound unit that contains the fundamental molecules of life and of which all living things are composed. ... A single cell is often a complete organism in itself, such as a bacterium or yeast. Other cells acquire specialized functions as they mature.