+C3a is a potent fragment born from the [complement system](/wiki/complement_system), a crucial part of innate immunity. As an [anaphylatoxin](/wiki/anaphylatoxin), it swiftly orchestrates cellular responses, notably triggering inflammation and guiding immune cells to sites of infection or injury.
+## See also
+- [C5a](/wiki/c5a)
+- [Inflammation](/wiki/inflammation)
+- [Immunity](/wiki/immunity)
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