<Table> <Tr> <Th_colspan="2"> T cell </Th> </Tr> <Tr> <Td_colspan="2"> Scanning electron micrograph of a human T cell </Td> </Tr> <Tr> <Td_colspan="2"> Scanning electron micrograph of a red blood cell (left), a platelet (center), and a T lymphocyte (right) </Td> </Tr> <Tr> <Th_colspan="2"> Details </Th> </Tr> <Tr> <Th> System </Th> <Td> Immune system </Td> </Tr> <Tr> <Th_colspan="2"> Identifiers </Th> </Tr> <Tr> <Th> Latin </Th> <Td> lymphocytus T </Td> </Tr> <Tr> <Th> MeSH </Th> <Td> D013601 </Td> </Tr> <Tr> <Th> TH </Th> <Td> H2. 00.04. 1.02007 </Td> </Tr> <Tr> <Td_colspan="2"> Anatomical terms of microanatomy (edit on Wikidata) </Td> </Tr> </Table> <Tr> <Th_colspan="2"> T cell </Th> </Tr> <Tr> <Td_colspan="2"> Scanning electron micrograph of a human T cell </Td> </Tr> <Tr> <Td_colspan="2"> Scanning electron micrograph of a red blood cell (left), a platelet (center), and a T lymphocyte (right) </Td> </Tr>

What are the different types of t cells and their functions