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When an infection is present,germinal centers form and the lymph node begins to release lymphocytes; some become antibody-producing plasma cells.
Lead
A heavy, malleable, ductile metal with a low melting point, often used in batteries and protective shielding.
Elemental Symbol
A notation consisting of one or two letters representing a chemical element (e.g., "O" for oxygen, "Fe" for iron).
Phosphorus
A nonmetallic chemical element with the symbol P, essential for life, found in DNA and cell membranes.
Elemental Symbol
A one- or two-letter abbreviation that represents a chemical element as found on the periodic table.
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