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the cardio system is a ___ system
closed
what allows blood to circulate
blood vessels
what surrounds the heart
pericardium (paritial is further visceral is inner)
myocardium is where
under pericardium
what recives
atria
what discharges
ventricles
separates two ventricles
interventricular septum
separates two atria
interatrial septum
what direction does pulmonary circulation go
right left right
where does pulmonary circulation flow
to the lungs thru pulmonary arteries (returns to heart thru veins)
what direction does systemic circulation go
left, thru body tissues, right
valve flows between atria and ventricles (bicuspid-left, tricuspid-right)
atrioventricular valves
valve flows between ventricles and arteries (pulmonary, aortic semilunar)
semilunar valves
anchor av valves
tendineae (heart strings)
open during relaxation, close during ventricular contraction
av valves
closed during relaxation, open during ventricular contraction
semilunar valves
branch from aorta to supply oxygenated blood to heart muscle
coronary arteries
drains myocardium of blood
cardiac veins
a large vein outside heart, receives blood from cardiac veins
coronary sinus
the hearts pacemaker
sinoatrial node
node at the junction of the atria and ventricles
atrioventricular node
bundles that are in the septum
atrioventricular bundle
av closes
Lub sound
semilunar closes
dub sound
how many beats per minute does the intrinsic conduction enforce
75
what conducts heart contraction
sinotrial node
CO=?
HR x SV
BPM is represented by what in the equasion
CO
Blood per beat is represented by what
SV
Heart rate is represented by what
HR
order of blood flow (arteries-veins)
Arteries > arterioles > capillaries < venules < veins
layers of tunics
tunica intima (inner), tunica media (mid), tunica externa (outer)
whats thicker arteries or veins
arteries
pressure at peak of contraction
systolic pressure (s/d)
pressure at lowest point of contraction
diastolic pressure (s/d)
Note
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