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��� JFIF ,, ���Exif II* � � U ] ( 1 e 2 y ; � �� % � i� � T lymphocytes and cancer cell. Coloured scanning electron micrograph (SEM) of T lymphocyte cells (smaller round cells) attached to a cancer cell. T lymphocytes are a type of white blood cell and one of the components of the body's immune system. They recognise a specific site (antigen) on the surface of cancer cells or pathogens and bind to it. Some T lymphocytes then signal for other immune system cells to eliminate the cell. Cytotoxic T lymphocytes eliminate the cell themselves by releasing a protein that forms pores in the cell's membrane. The genetic changes that cause a cell to become cancerous lead to the presentation of tumour antigens on the cell's surface. Magnification: x1750 at 10 centimetres wide. , , Adobe Photoshop 7.0 2022:08:19 20:31:11 SCIENCE PHOTO LIBRARY © STEVE GSCHMEISSNER/SCIENCE SOURCE � 0220� �� � � N V ( ^ e H H ��� JFIF H H �� Adobe_CM �� Adobe d� �� � �� U �"