Auricula: Atrii

: A wedge-shaped or conical pouch located at the front upper surface of the right atrium . It overlaps the root of the aorta.

: The right atrial appendage (RAA) specifically helps manage blood volume by releasing certain proteins. Clinical Importance 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 : A wedge-shaped or conical pouch located at

: A bloused fold projecting from the left atrium that lies near the left pulmonary veins. Functional Significance Clinical Importance The , commonly known as the

: 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.

: These appendages have a rough, trabeculated inner surface due to a network of pectinate muscles , which distinguishes them from the smoother main bodies of the atria. Location :