sinoatrial node

Found in Anh - Anh (Wordnet)

Definition Noun : A specialized bit of heart tissue that controls the heartbeat : The sinoatrial node is a small, specialized group of cells located in the right atrium of the heart. It functions as the heart's natural pacemaker by generating electrical impulses that initiate each heartbeat, thereby setting the rhythm and rate of the heart's contractions. Usage Examples Noun : The electrical si...