<P> Fresh frozen plasma is on the WHO Model List of Essential Medicines, the most important medications needed in a basic health system . </P> <Table> <Tr> <Th> Ion </Th> <Th> Normal concentration range (mEq. L) </Th> </Tr> <Tr> <Td> Sodium </Td> <Td> 135--145 </Td> </Tr> <Tr> <Td> Potassium </Td> <Td> 3.6--5.1 </Td> </Tr> <Tr> <Td> Chloride </Td> <Td> 95--105 </Td> </Tr> <Tr> <Td> Calcium </Td> <Td> 2.0 </Td> </Tr> </Table> <Tr> <Th> Ion </Th> <Th> Normal concentration range (mEq. L) </Th> </Tr> <Tr> <Td> Sodium </Td> <Td> 135--145 </Td> </Tr>

Where is blood plasma found in the body