How can we help?

You can also find more resources in our Help Center.

28 terms

The Heart

STUDY
PLAY
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