The Heart

Created by hkboyer16 

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Atrium (Atria)

Chambers of the heart that receive blood back from the body to the heart

Auricle

Protective covering on the outside of the atrium

Right Atrium

Upper chamber of the heart that receives blood from the Vena Cava

Left Atrium

Upper chamber of the heart that receives blood from the Pulmonary Arteries

Tricuspid Valve

Structure between the Right Atrium & Right Ventricle that prevents backflow of blood

Bicuspid Valve

Structure between the Left Atrium & Left Ventricle that prevents backflow of blood

Right Ventricle

Lower chamber of the heart that sends blood to the Pulmonary Trunk/Arteries

Left Ventricle

Lower chamber of the heart that sends blood to the Aorta

Aortic Semilunar Valve

Structure between the Left Ventricle and the Aorta that prevents backflow of blood

Pulmonary Semilunar Valve

Structure between the Right Ventricle and the Pulmonary Trunk that prevents backflow of blood

Ventricles

Chambers of the heart that pump blood out of the heart and to the body

Coronary Sulcus

Region on the external portion of the heart that separates the atrias and ventricles

Septum

Internal structure of the heart (made of myocardium) that separates the right and left sides

Conduction System

The heart's regulating system; composed of specialized muscle tissue that generates action potentials within the heart muscle to initiate the heart beat

SA Node (Sinoatrial Node)

The heart's natural pacemaker; it is found in the Right Atrium and initiates the heartbeat

AV Node (Atrioventricular Node)

Located in the interatrial septum, just above the ventricles, that receives the action potential from the SA Node

AV Bundle

Series of branches found within the interventricular septum that receives an impulse from the AV Node and sends it onto the Bundle Brances of the heart

Bundle Branches

Series of branches found below the AV Bundle that receives the impulse and carries it onto the Purkinje Fibers

Purkinje Fibers (Conduction Myofibers)

Fibers located within the myocardium of the ventricles; once the action potential is received, it completes ventricular contraction of the heart

Systole

The contraction phase of a chamber of the heart

Diastole

The relaxation phase of the heart

Aorta

Largest artery in the body that carries OXYGENATED blood to all of the tissues & organs; it leaves from the left ventricle of the heart

Superior Vena Cava

Major vein that drains the head & neck of the body and carries DEOXYGENATED blood back to the right atrium of the heart

Inerior Vena Cava

Major vein that drains the lower part of the body and carries DEOXYGENATED blood back to the right atrium of the heart

Pulmonary Arteries

Blood vessels that leave the right ventricle to take blood TO the lungs; these are the only arteries in the body to carry DEOXYGENATED blood

Pulmonary Veins

Blood vessles that return blood TO the heart andenter the heart at the left aftrium; these are the onlyl veins in the body to carry OXYGENATED blood

Coronary Arteries

Arteries that supply oxygenated blood directly to the heart wall/myocardium

Cardiac Veins & Coronary Sinus

Veins that drain deoxygenated blood from the heart wall/myocardium and return it to the heart at the right atrium

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