: The right atrial appendage (RAA) specifically helps manage blood volume by releasing certain proteins. Clinical Importance
: They act as "reservoirs" that can expand to increase the capacity of the atria during periods of high cardiac output or when blood flows quickly back to the heart. auricula atrii
The , commonly known as the atrial appendage or auricle of the heart , is a small, muscular, ear-shaped pouch that projects from each of the heart's two upper chambers (atria). Key Anatomical Features : The right atrial appendage (RAA) specifically helps