Cardiovascular System Ch. 11 Flashcards
aorta
largest artery in the body
arteriole
small artery
“ole” = little/ small
artery
largest type blood vessel; carries blood AWAY from the heart to all parts of the body
atrioventricular bundle (bundle of His)
specialized muscle fibers connecting the atria with the ventricles and transmitting electrical impulses between them.
His pronounced “hiss”
atrioventricular node
AV node
Specialized tissue in the wall between the artria.
Electrical impulses pass from the pacemaker (SA node) through the AV node and the atrioventricular bundle or bundle of His toward toward the ventricles.
atrium (plural: atria)
one of two upper chamber of the heart
capillary
smallest blood vessel.
Materials pass to and from the bloodsteam through the thin capillary walls.
carbon dioxide (CO2)
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.
(from Greek diastole, dilation.)
heart refills with blood
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
myocardium
muscular, middle layer of the heart
oxygen
gas that enters the blood through the lungs and travels to the heart to be pumped via arteries to all body cells.
pacemaker (sinoatrial node)
specialized nervous tissue in the right atrium that begins the heartbeat.