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Embryology

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

Authoring team

The right atrium represents two different developmental structures:

  • the right horn of the sinus venosus; this is absorbed during development to form the sinus venarum
  • the rough-walled anterior section of the right atrium represents the true embryological atrium

The region between the two is demarcated by the crista terminalis.

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