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supporting cells in nerve tissue.
proteins that identify and neutralise foreign and potentially harmful antigens by binding onto...
the space in the middle of the tooth which contains cells, blood vessels and a nerve.
structure within the cell cytoplasm that is surrounded by its own membrane and has a specific...
an alkaline watery fluid containing digestive enzymes, which is secreted into the mouth by...
large spongy organs in which gaseous exchange takes place in vertebrates (with the exception of...