EKG and Heart anatomy

Location of the heart

• Thoracic cavity

• pericardium

designed to open and close so that blood can flow in one direction

• ventricles

• valves

• atria

valve located between the left ventricle and ascending aorta

• atrium

• aortic valve

• mitral valve

protective, fibrous membrane that surrounds the heart

• lumen

• pericardium

The lower chambers of the heart

• atrium

• ventricles

a dividing wall in the heart made of thick muscle that separates the right from the left side of the heart

• atrium

• septum

• ventricle

valves that separate the atria from ventricles

• septum

• AV valves

blood vessels decrease in diameter

• vasoconstriction

• vasodilation

valve located between the right atrium and right ventricle, prevents backflow of blood into the right atrium

• mitral valve

• tricuspid valve

• bicuspid valve

valve that separates the left atrium from the left ventricle, preventing backflow of blood into the left atrium

• tricuspid valves

• bicuspid valves

• myocardium