cardiovascular system Flashcards
(32 cards)
4 chambers of the heart
R atrium + R ventricle
L atrium + L ventricle
layers of the heart wall
pericardium -> epicardium (visceral) ->
myocardium ->
endocardium (electrical conduction)
pericardial membranes
outer layer: fibrous
inner layer: serous (parietal + visceral layers)
where does the R atrium receive blood from
systemic blood (to get oxygenated in the lungs)
role of the R ventricle
pump blood from body into lungs through pulmonary artery for oxygenation
where does L atrium receive blood from
from the lungs to get sent into the body
role of the L ventricle
pump blood into the body through pulmonary aorta
tricuspid valve
valve between R atria + R ventricle
bicuspid (mitral) valve
valve between L atria + L ventricle
pulmonary valve
valve between R ventricle + pulmonary artery (where blood enters lungs)
aortic valve
between L ventricle + aorta (where blood enters body)
large superior + inferior vena cava
receives deoxygenated blood from veins in the body that will get pumped through pulmonary trunk
pulmonary arteries
carries blood to the lungs to unload CO2 + picks up O2
pulmonary veins
4 veins where oxygenated blood enters from lungs into L side of heart
aorta
where blood is pumped out of into systemic arteries that supply body tissues
where do arteries carry blood
AWAY from the heart
(arterioles = smallest arteries)
where do veins carry blood
TOWARDS the heart
capillaries
smallest blood vessels that venules collect blood from (where blood + interstitial fluid is exchanged)
conducting cells
carry electric signals
cardiac muscle cells
control the heart’s contractions
pathway of conduction cycle
- SA node
- atrial myocardium (depolarization)
- AV node (contraction)
- AV bundle
- R + L bundle branches
- Purkinje fibers (blood leaves heart)
systole
heart contraction
diastole
heart relaxation
first heart sound
“lub” sound caused by closing of the AV valves (end of atrial systole)
