Ch. 11 Cardiovascular system Flashcards
(48 cards)
cardiovascular system
delivers oxygen and nutrients to cells of body tissue
ateries
vessels that lead away from heart
arterioles
smaller branches of arteries
veins
have thinner walls than arteries and move deoxygenated blood toward the heart from the tissues
venules
small veins that carry waste filled blood back to the heart
capilleries
smallest vessels
point of exchange for oxygen and nutrients into body cells
which blood vessel has a valve
vein
diastole
relaxation
systole
contractions
SA node
pacemaker of the heart
pacemaker
origin of electrical impulse causing walls of the atria to contract and force blood into the ventricles
AV node
sends excitation wave to a bundle of specialized fibers
blood pressure
the force that blood exerts on arterial walls
sphygmomanometer
measures blood pressure
hypertension
high blood pressure
aorta
the largest artery in the body
endocardium
inner lining of the heart
endothelium
innermost lining of blood vessels
murmur
abnormal swishing sound caused by improper closure of heart valves
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
pulse
the beat of the heart as felt though the walls of the arteries
septum
wall dividing a cavity
