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med terminology .5

chapter 5

circulatory system heart, veins, arteries, capillaries; removes waste and circulates vital nutrients
angi/o vessel
aort/o aorta
arteri/o artery
ather/o fatty substance
atri/o atrium
cardi/o heart
coron/o heart
hemangi/o blood vessel
phleb/o vein
sphygm/o pulse
steth/o chest
thromb/o clot
valv/o valve
valvul/o valve
vascl/o blood vessel
vas/o vessel,duct
ven/o vein
ventricul/o ventricle
-manometer measures pressure
-tension pressure
-ule small
pulmonary circulation heart/lungs then -02 back to lungs to get more 02
systemic circulation carries O2 rich blood to the body
heart location mediastinum behind the sternum
heart layers endocardium (inner layer), myocardium (muscular middle layer), epicardium (outer layer divided into visceral pericardium which is the inside of the sac and the parietal pericardium which is the outside of the sac)
atria upper chambers
ventricles lower chambers
interatrial septum and interventricular septum divide atria and ventricles respectively
tricuspid valve (AV) right atrium/right ventricle
pulmonary valve (SL) right ventricle and pulmonary artery
bicuspid valve (mitral) enters left ventricle
aoritc valve leaves left ventricle
BLOOD FLOW STEPS 1-3 1) deoxygenated 02 goes into relaxed right atrium via superior and inferior vena cava 2) right atrium contracts blood goes through tricuspid to right ventricle 3) right ventricle contracts sends blood through pulmonary valve, goes to lungs
BLOOD FLOW STEPS 4-6 4)left atrium gets blood from heart that has been oxygenated by lungs (comes in via pulmonary veins) 5) left atrium contracts sends blood through bicuspid into left ventricle 6)left ventricle contracts blood goes into the aorta to rest of body
relaxed period for a chamber diastole
contraction period for a chamber systole
autonomic nervous system heart rate is regulated in this method; it is involuntary
sinoatrial node electrical impulse to keep heart beating
heart conduction 1) SA node sends impulse to go into atria systole 2) atrioventricular node is stimulated 3)atrioventricular bundle stimulated 4) signal travels down bundle branches 5) Purkinje fibers in myocardium stumulated, ventricular systole
lumen channel in which blood flows through a vessel
coronary arteries branch from aorta
arterioles smallest arteries give blood to capillaries
capilaries thin walled to allow for gas exchange
veins thinner walls, easily collapsible, valves prevent backflow, lower blood pressure
venules blood leaving capillaries enters venules which merge into larger veins
arteries thick walled vessels, high blood pressure to keep blood always flowing (no need for valves)
blood pressure measure of the force exerted against the wall of a blood vessel
systolic pressure when the blood is under a lot of pressure from ventricular contraction it has the highest reading
pulse the surge of blood caused by the heart contraction
diastolic pressure pressure from blood not being pushed by the heart is a t its lowest point
auscultation listening to sounds from the body
catheter flexible tubing for the purpose of moving fluids in or out of the body
infarct an area of an organ that undergoes necrosis once it has no more blood supply
ischemia temporary local deficiency of blood due to an obstruction in the circulation
murmur abnormal heart sound
orthostatic hypotension sudden drop in blood pressure
palpitation pounding heartbeat
plaque fatty deposits of lipids
regurgitation backflow of blood through a valve
stent widens lumen
arrhythmia irregular heartbeat
Heart pathology angia pectoris, bundle branch block, cardiac arrest, cardiomyopathy, congentital septal defect, congestive heart failure, coronary artery disease, endocarditis, fibrillation, flutter, heart valve prolapse, heart valve stenosis, myocardial infarction
Vessel pathology aneurysm, arteriosclerosis, atherosclerosis, coarctation of the aorta, embolus, hemorrhoid, hypertension, hypotension, patent ductus arteriosus, peripheral vascular disease, polyarteritis, raynaud's phenomenon, thrombophlebitis, thrombus, varicose veins
Created by: sazzduhnuh