Chpt 11 Cardiovascular System Flashcards
aorta
largest artery in the body
apex
lower tip of the heart
ateriole
small artery
artery
largest type of blood vessel; carries blood away from the heart to all parts of the body
atrioventricular bundle (bundle of His)
specialized muscle fibers connection 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 toward the ventricles.
atrium (atria)
one of the two upper chambers of the heart
capillary
smallest type of blood vessel. Materials pass to and from the blood stream through the thin capillary walls.
carbon dioxide (CO2)
gas (waste) released by body cells, transported via veins to the heart and then to thee lungs for exhalation.
carotid arteries
2 common carotid arteries located on each side of the neck branch form the aorta and provide blood to head, neck, and brain
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 electrical activity of the heart . Electricity is represented by waves of deflections called P,QRS, T
endocardium
inner lining of the heart