The Crista Terminalis is a prominent, crescent-shaped ridge of muscle located in the right atrium of the heart. It demarcates the boundary between the smooth-walled part of the right atrium, known as the Sinus Venarum, and the rough-walled part, known as the Atrium Proper. This structure is significant for its role in the conduction of electrical impulses within the heart and serves as an anatomical landmark in cardiac anatomy.
