Auricula Atrii Apr 2026

: 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 :

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 auricula atrii

: A bloused fold projecting from the left atrium that lies near the left pulmonary veins. Functional Significance : These appendages have a rough, trabeculated inner