Examlex
What brain structures are involved in the circuit that produces anxiety reactions?
SA Node
The sinoatrial node, known as the heart's natural pacemaker, which initiates the electrical impulses that dictate heart rhythm.
Coronary Veins
Veins that drain deoxygenated blood from the myocardium (heart muscle) into the right atrium.
Myocardium
The muscular tissue of the heart, responsible for the contraction and propulsion of blood.
Coronary Sulcus
A groove on the surface of the heart marking the division between the ventricles and the atria.
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