chapter 11 cardiovascular system Flashcards
aorta
largest artery in the body
arteriole
small artery
artery
largest type of blood vessel; carries blood away from the heart to all parts of the body. Notice that artery and away begin with “a”
atrioventricular bundle (bundle of His)
specialized muscle fibers connecting the atria with the ventricles and transmitting electrical impulses between them.
atrioventricular node (AV node)
specialized tissue in the wall between the atria. electrical impulses pass from the pacemaker (sa node) through the AV node and the atrioventricular bundle or bundle of His toward the ventricles.
atrium
one of two upper chambers of the heart.
capillary
smallest blood vessel. Materials pass to and from the bloodstream through the thin capillary walls.
carbon dioxide
gas (waste) released by body cells, transported via veins to the heart, and then to the lungs for exhalation.
coronary arteries
blood vessels that branch from the aorta and carry oxygen-rich blood to the heart muscle.
deoxygenated blood
blood that is oxygen poor
diastole
relaxation phase of the heartbeat.
electrocardiogram
record of the electricity flowing through the heart. The electricity is represented by waves or deflections called P, QRS, or T
endocardium
inner lining of the heart.
endothelium
innermost lining of blood vessels.
mitral valve
valve between the left atrium and the left ventricle; bicuspid valve
murmur
abnormal swishing sound caused by improper closure of the heart valves.
myocardium
muscular, middle layer of the heart.
normal sinus rhythm
heart rhythm originating in the sinoatrial node with a resting rate of 60 to 100 bpm
oxygen
gas that enters the blood through the lungs and travels to the heart to be pumped via arteries to all body cells.
pacemaker (SA node)
specialized nervous tissue in the right atrium that begins the heartbeat. An artificial cardiac pacemaker is an electronic apparatus implanted in the chest to stimulate heart muscle that is weak and not functioning.
pericardium
double-layered membrane surrounding the heart.
pulmonary artery
artery carrying oxygen-poor blood from the heart to the lungs.
pulmonary circulation
flow of blood from the heart to the lungs and back to the heart.
pulmonary valve
valve positioned between the right ventricle and the pulmonary artery.
pulmonary vein
one of two pairs of vessels carrying oxygenated blood from the lungs to the left atrium of the heart.
pulse
beat of the heart as felt through the walls of the arteries.
septum
partition or wall dividing a cavity; such as between the right and left atria (interatrial septum) and right and left ventricles (interventricular septum)
sinoatrial node (SA node)
pacemaker of the heart.
sphygmomanometer
instrument to measure blood pressure.
systemic circulation
flow of blood from body tissue to the heart and then from the heart back to body tissues.
systole
contraction phase of the heartbeat.
tricuspid valve
located between the right atrium and right ventricle; it has three leaflets, or cusps
valve
structure in veins or in the heart that temporarily closes and opening so that blood flows in only one direction.
vein
thin-walled vessel that carries blood from body tissues and lungs back to the heart. veins contain valves to prevent backflow of blood.
vena cava
largest vein in the body. The superior and inferior venae cavae return blood to the right atrium of the heart.
ventricle
one of two lower chambers of the heart.
venule
small vein.
angi/o
vessel
aort/o
aorta
arter/o, arteri/o
artery
ather/o
yellowish plaque, fatty substance
atri/o
atrium, upper heart chamber
brachi/o
arm
cardi/o
heart
cholesterol/o
cholesterol (a lipid substance)
coron/o
heart
cyan/o
blue
myx/o
mucus
ox/o
oxygen
pericardi/o
pericardium
phleb/o
vein
rrhythm/o
rhythm
sphygm/o
pulse