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|Description= '''A.''' This right lateral view shows the right atrium dominated by its large, triangluar shaped appendage. The dots mark the terminal groove. The arrow indicates the crest of the appendage. | |||
<br>'''B.''' The lateral wall of the appendage incised and flipped backward to show the pectinate muscles and the thin, membrane-like atrial wall between the muscle bundles. The terminal crest (dots) marks the border between the pectinated appendage and the smooth-walled venous sinus. The oval fossa is surrounded by its muscular rim. The smooth-walled vestibule leads to the tricuspid valve orifice. | |||
|Source= provided by S. Yen Ho, PhD FRCPath FESC FHEA, Royal Brompton Hospital, UK | |||
|Date= 2012 | |||
|Author= S. Yen Ho, PhD FRCPath FESC FHEA, Royal Brompton Hospital, UK | |||
|Permission= | |||
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