YEar 11 circ system Flashcards
(19 cards)
what is heart surrounded by?
pericardium
aorta
main artery to body
inferior vena cava
heart to lower body
superior vena cava
heart to upper body
pulmonary trunk
heart to lungs
left atrium
receives blood from lungs
left ventricle
pumping to body (via aorta)
Right ventricle
to lungs
Right atrium
recieves from body
what is left side thicker than right?
needs to be able to pump blood around the body
atrioventricular valves
between atria and ventricles
prevents back flow into atria when ventricles contract
semilunar valves
between ventricles and arteries
prevents back flow from arteries into ventricles while relaxing
what is cardiac cycle
one complete sequence of events of the pumping of the heart
systole is
contraction
contraction
systole
diastole
relaxation
relaxation
diastole
what are capillaries
blood vessels that have further divided for easier exchange, so each cell has its own blood supply, minimal travel space
where
