function of the cardiovascular system Flashcards
what does blood carry round the body?
o2 and co2 nutrients metabolites hormones heat
how is the cvs system flexible?
pump can vary output
vessels can redirect blood
vessels can store blood
what must be equal if the pumps are in series?
output
what does vascular beds being in parallel allow?
all tissues get oxygenated blood
allows regional redirection of blood
exceptions prove the rule
what does pressure difference equal?
Mean Arterial Pressure –
Central Venous Pressure
Affects all tissues
what controls the (flow = change in pressure/ resistance)
radius^4
on the leftside of the lung, is it arteries or arterioles that goes into the legs
arterioles
what are characteristics of the aorta
Elastic arteries = aorta
wide lumen, elastic wall
damp pressure variations
what are characteristics of arteries?
Muscular arteries = other arteries
wide lumen, strong non-elastic wall
low resistance conduit
what are characteristics of arterioles
Resistance vessels = arterioles
narrow lumen, thick contractile wall
control resistance & therefore flow
allow regional redirection of blood
what are characteristics of capillaries?
Exchange vessels = capillaries
narrow lumen, thin wall
what are characteristics of venules and veins?
Capacitance vessels = venules & veins
wide lumen, distensible wall
low resistance conduit, & reservoir
allows fractional distribution of blood between veins & rest of circulation (esp. heart)
which side of the heart pumps towardsd rest of the body?
left
which side of the heart pumps towards the lungs?
right
which vein is oxygenated?
pulmonary vein
