The heart Flashcards
walls of your heart are almost entirely what
muscle
how many chambers does the heart have
4
where does blood come in from into the atrium
the veins
where does blood enter through
the top chambers called the atria
the blood coming into the right atrium from the vena cava is what blood
deoxygenated blood from body
the blood coming into the left atrium from the pulmonary vein is
oxygenated blood from your lungs
why does the atria contract
to force blood into the ventricles below
what do valves do
prevent back flow
another thing to ventricles do
contract to push the blood out from the heart
what and where does the right ventricle force blood
deoxygenated blood- to the lungs in the pulmonary artery
what and where does the left ventricle force blood
oxygenated blood- to the body in aorta
what side of the heart has more muscle and why
left- allows pressure needed to pump all around body
what side of the heart has less muscle and why
right- go straight to lungs so not much pressure needed- would also damage delicate capillary network where gas exchange happens
what’s coronary heart disease
the arteries that supply blood to the heart become narrow
what’s a common cause of coronary heart disease
buildup of fatty material on lining of vessel
if blood flow is reduced due to coronary heart disease what happens
supply of oxygen to the heart is also reduced
what can coronary heart disease result fataly in
pain, heart attack or death
what can coronary heart disease be solved with
a stent- metal mesh placed in artery
what does a stent do
holds blood vessel open
what is bypass surgery
replacing narrow or blocked artery with bits of veins from other parts of body
what is bypass surgery good for
badly blocked arteries
what do statins do
reduces blood cholesterol levels + slows rate of fatty material deposited
symptoms of CHD
shortness of breath, chest pain, sickness
what side of heat is tricuspid valve
right
