Circulation and perfusion

SA node

the primary pacemaker of the heart

the AV node

the secondary backup pacemaker

hemoglobin

RBC carries oxygen

arteries

carry oxygenated blood to the tissues

what artery is an exception to carrying oxygen

the pulmonary artery it carries deoxygenated blood

veins

carries deoxygenated blood to heart/ lungs

what vein is an exception to carry deoxygenated blood

pulmonary veins carry oxygenated blood to left side of heart

arteries have

thick elastic walls

veins and venules

thin muscular but inelastic walls that collapse easily

what do coronary arteries

provide blood supply to the heart

fill during diastole

older adults have

more thicker rigid (stiff) heart valves, decreased myocardial strength

what predisposes a person to the development of atherosclerosis, coronary artery disease, and hypertension

diet in high saturated fats

beta blockers

used to reduce the workload of the heart, control abnormal heart rhythm

Calcium Channel Blockers (CCBs)

block the flow of calcium into the cells of the heart and blood

cardiac pain is usually where

center or on the left side of the heart radiating down the left arm