the heart and cardiac cycle Flashcards
what is the septum
separates the two sides of the heart, makes sure blood doesnt mix
how do valves in the heart move
open when the pressure of blood behind them is greater than the pressure in front of them
Close when the pressure of blood in front of them is greater than the pressure behind them
which valve is at the right atrium
tricuspid
what is the role of the coronary artery
supplies the cardiac muscle cells with oxygenated blood
blood is pumped from atria to ventricle through the:
atrioventricular valve
which side of the heart has thicker muscular walls?
left
which ventricle pumps oxygenated blood to the lungs
right
what is the contraction of the heart called
systole
what is diastole?
relaxation of the heart
what does systole of the heart cause?
decreasing volume of the corresponding chamber
when volume decreases, pressure…
increases
what is atrial systole?
when the atria contract
why is atrial systole less powerful than ventricular systole?
due to gravity, they dont need to pump the blood as forcefully
which way to arteries carry the blood
Away Arteries
which way to veins transport the blood
vein IN
what is an arteriole?
connects arteries and capillaries
