Cardiac Cycle Word Scramble
|
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Question | Answer |
STEP 1 - Atrial Systole | As atria contract, rising atrial pressures push blood into the ventricles thru the open right and left AV valves. |
STEP 2 - Atrial Systole | Start of atrial systole, ventricles already filled 70%. As atria contract, rising atrial pressure provide the remaining 30 percent by pushing blood thru the open AV valves. Atrial systole 'tops off' ventricles. |
STEP 3 - Atrial Systole | End of atrial systole, each ventricle contains maximum amount of blood that it will hold in cardiac cycle = End diastolic volume EDV |
STEP 4 - Ventricular Systole. | ventricles are contracting. bloow flow has yet to occur. ventricles contract isometrically: generate tension and pressure. flow does not occur. isovolumetric contraction: all valves closed. volume constant and pressure rises. |
STEP 5 - Ventricular Systole | Once ventricle pressure exceeds that in arterial trunks. semilunar valves open and blood flows into pulmonary and aortic trunks = ventricular ejection. isotonically contract: muscle cells shorten. tension constant. |
STEP 6 - Ventricular Systole | near end of VS, ventricular pressure falls.blood in aorta + pulmonary trunk now starts to flow twrd ventricles-> closes semilunar valves. pressure rises again as arterial walls recoil, amt of blood remaining in ventricle = end systolic volume |
STEP 7 - Ventricular Diastole | all heart valves closed.vent. myocardium relaxing vent pressures higher than atrial pressures blood cannot flow into ventricles. isovolumetric relaxation; rapid drop in pressure over this period |
STEP 8 - Ventricular Diastole | when ventricular pressure fall below atria. atrial pressure forces valves open.blood flows into ventricles. both atria + vent = diatole. vent. pressure continues to fall > chambers expand. |
Created by:
zeenat
Popular Physiology sets