Blood, Heart Flashcards
Atria -gravity vs pumping
80% of blood falls from gravity
20% of blood is pumped into ventricle
Atria , blood comes from ?
2 upper chambers , and blood enters atria from Veins always!
Ventricles ?blood comes from?
2 larger lower chambers , blood is always received from atria and then always pumps blood into arteries
Ventricles- are pressure generators because ?
High pressure to low pressure always
Once blood is in ventricles it pumps blood into —— and —–
Arteries ….. And twist to pump blood
Heart valves——
Prevent backflow of blood
R&L atrioventricular valves allow blood to flow into ?
Ventricles
Atrioventricular valves close when —
Ventricles contract
Semilunar outlet valves let blood out of ——– into —-?
Ventricles and into arteries
Semilunar outlet valves close when —- —–? Preventing ?
Ventricles relax and prevents backflow from arteries
Arteries are vessels that ?
Carry blood AWAY from Heart !!
Veins always carry blood —-?
TOWAaRDs the heart
Systemic circuit is controlled by the — side where blood flows from — to —/
Left side —.. Head to toe
Arteries..in systemic circuit carries O2 —-and CO2 —blood to all tissues of blood
O2 rich and CO2 poor to tissues
Veins .. In systemic circuit carries O2 —, CO2 —– back to right side
O2 poor and CO2 rich back to right side of heart
Pulmonary circuit is controlled by the —- —– of heart and pumps blood to —– and back to — side
Right side of heart ,, pumps blood to lungs and back to left side
Arteries .. In pulmonary circuit carry O2 — and CO2 —- blood to lungs
O2 poor CO2 rich blood to lungs
Veins .. In pulmonary circuit carries O2 rich CO2 — blood back to — atria
Veins O2 rich CO2 poor blood to left atria
Cardiac muscle cells – what does Purkinje fibers do?
This signal cardiac muscles to contract - part of electrical conduction
Gap junctions are ?
Is where electrical connects 2 cardiac muscles cells
Syncitium is where many ?
Many cells work together as a single unit
Cardiac muscles cells are auto-rhythmic ?
One contracts all contract
Cardiac muscle cells metabolize —— ?
Aerobically - extract 70% of O2 from coronary arteries
Cardiac muscle cells use — for fuel source not —?
Lipid fuel source - do not glucose
