A&P chapter 13 The Heart
cardi/o
heart
pulmon/o
lung
atrioventricular node
the group of conduction fibers carrying impulses from the av node
angi/o
vessel
sinus arrythmia
a beat that comes before the normal beat
tachycardia
a heart rate of greater than 100 beats/min
bradycardia
a heart rate of less than 60 beats/min
endocardium
a layer of epithelial cells in contact with blood within the heart
sinus rhythm
a normal heart beat, originating from the normal heart pacemaker
extrasystole
a normal variation in heart rate caused by changes in breathing rate
visceral layer
an alternate term for the epicardium
steth/o
chest
0.8 second
how long does it take to complete an average cardiac cycle
atrioventricular valve
one of two valves dividing the upper and lower chambers
tachy-
rapid
sin/o
sinus
brady-
slow
stroke volume
the amount of blood ejected from a ventricle with each beat
right ventricle
the chamber that pumps blood to the lungs
left ventricle
the chamber that pumps oxygen rich blood to the body
left atrium
the chamber that receives blood from the lungs
right atrium
the chamber that receives oxygen poor blood from the body
purkinje fibers
the group of conduction fibers found in the ventricles walls
myocardium
the heart layer containing intercalated disks
fibrous pericardium
the heart wall layer composed of connective tissue
atrioventricular bundle
the mass of conduction tissue located in the septum at the bottom of the right atrium
serous pericardium
the membrane consisting of a visceral and a parietal layer
sinoatrial node
the name of the normal heart pacemaker, located in the upper wall of the right atrium
parietal layer
the outermost layer of the sac enclosing the heart
systemic circuit
the pathway that carries blood to and from body tissues
pulmonary circuit
the pathway that carries blood to and from the lungs
apex
the pointed, inferior portion of the heart
diastole
the resting period of the cardiac cycle
base
the site where major vessels attach to the heart
atrial systole
the stage of the cardiac cycle that directly follows the resting period
ventricular systole
the stage of the cardiac cycle that proceeds the resting period
aortic valve
the valve that prevents blood from returning to the left venticle
pulmonary valve
the valve that prevents blood from returning to the right ventricle
cardiac output
the volume of blood pumped by each ventricle in 1 minute
decrease heart rate but not myocardial contraction strength
what is the effect of the parasympathetic nervous system on the heart?
left atrium
which heart chamber receives blood from the lungs?
myocardium
which heart layer id formed of muscle tissue?
the visceral and parietal layers of the serous pericardium
which membranes are separated by the pericardial space?
atrioventricular valve
which of the following is not a part of the conduction system of the heart?
tachycardia
which of these terms best describes an abnormally high heart rate
cardiac output
which of these terms describes the volume of blood pumped by each ventricle in 1 minute
echocardiography
which technique uses ultrasound waves to image the heart in action?
coronary sinus
which vein carries blood from the coronary circulation back into the right atrium?