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51 terms

HEART combining form

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angio/o, vas/o, vascul/o
vessel
aort/o
aorta
arteri/o
artery
cardi/o
heart
coron/o
circle or crown
my/o
muscle
pector/o, steth/o
chest
sphygm/o
pulse
thromb/o
clot
ven/o, phleb/o
vein
varic/o
swollen, twisted vein
ventricul/o
ventricle (belly or pouch)
atrium
upper right or left chamber of the heart
endocardium
membrane lining the cavities of the heart
epicardium
membrane forming the outer layer of the heart
interatrial septum
partition between the right and left atria
interventricular septum
partition between the right and left ventricles
myocardium
heart muscle
pericardium
protective sac enclosing the heart composed of two layers with fluid between
visceral pericardium
layer closest to the heart (visceral = pertaining to organ)
parietal pericardium
outer layer (parietal = pertaining to wall)
pericardial cavity
fluid-filled cavity between the pericardial layers
ventricle
lower right or left chamber of the heart
heart valves
structures within the heart that open and close with the heart beat to regulate the one way flow of blood
aortic valve
heart valve between the left ventricle and the aorta
mitral valve / bicuspid valve
heart valve between the left atrium and the left ventricle
Pulmonary semilunar valve
heart valve opening from the right ventricle to the pulmonary artery (luna = moon)
tricuspid valve
valve between the right atrium and the right ventricle
valves of the veins
valves located at intervals within the lining of veins, espeicially in the legs, which constrict with muscle action to move the blood returning to the heart
arteries
vessels that carry blood from the heart to the arterioles
aorta
large artery that is the main trunk of the arterial system branching from the left ventricle
arterioles
small vessels that receive blood from the arteries
capillaries
tiny vessels that join arterioles and venules
venules
small vessels that gather blood from the capillaries into the veins
veins
vessels that carry blood to the heart from the venules
systemic circulation
circulation of blood throughout the body via arteries, arterioles, capillaries, venules, and veins to deliver oxygen nutrients to body tissues
coronary circulation
circulation of blood through the coronary blood vessels to deliver oxygen and nutrients to the heart muscle tissue
pulmonary circulation
circulation of blood from the pulmonary artery through the vessels in the lungs and back to the heart via the pulmonary vein, providing for the exchange of gases
diastole
to expand; period during the cardiac cycle when blood enters the relaxed ventricles from the atria
systole
to contract; period during the cardiac cycle when the heart is in contraction and blood is ejected through the aorta and the pulmonary artery
normotension
normal blood pressure
hypotension
low blood pressure
hypertension (HTN)
high blood pressure
sinoatrial (SA) node
the pacemaker; highly specialized, neurological tissue impeded in the wall of the right atrium; responsible for INITIATING electrical conduction of the heartbeat, causing the atria to contract and firing conduction of impulses to the AV node
atrioventricular (AV) node
neurological tissue in the center of the heart that receives and amplifies the conduction of impulses from the SA node to the bundle of His
bundle of His
neurological fibers extending from the AV node to the right and left bundle branches that fire the impulse from the AV node to the purkinje fibers
Purkinje fibers / network
fibers in the ventricles that transmit impulses to the right and left ventricles, causing them to contract
polarization
resting; resting state of a myocardial cell
depolarization
change of a myocardial cell from a polarized (resting) state to a state of contraction (de = not ;polarization = resting)
repolarization
recharging of the myocardial cell from a contracted state back to a resting state (re = again; polarization = resting)
normal sinus rhythm (NSR)
regular rhythm of the heart cycle stimulated by the SA node (average rate of 60-100 beats/minute)