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Editor-In-Chief: C. Michael Gibson, M.S., M.D. 
Associate Editor-In-Chief: Cafer Zorkun, M.D., Ph.D. 
In the development of the human heart, the right horn and transverse portion of the sinus venosus ultimately become incorporated with and form a part of the adult right atrium. The line of union between the right atrium and the right auricle is present on the interior of the atrium in the form of a vertical crest, known as the crista terminalis of His (Wilhelm His, Jr.).
- Template:SUNYAnatomyLabs - "Heart: Chamber of Right Atrium"
- UMichAtlas|ht_rt_atrium - "Right atrium, internal structure, anterior view"
- Diagram at ctsnet.org