intro to cardiovascular system Flashcards
what percentage of body is water
60%
how many litres of intracellular fluid
24L
how many litres of extracellular fluid
12L
how many litres of extravascular fluid (interstitial)?
9L
how many litres of blood?
5.4L
what is laminar flow?
flow fastest in the centre, slower on the edges of vessels
where is the biggest pressure change in the blood vessels
arterioles
what is systolic pressure and diastolic pressure
systolic - when arteries are under the most pressure due to systole (pumping of blood)
diastole - least pressure as blood as passed through, between pulses
what is function of fibrous tissue in vessels
protective
function of smooth muscle in vessels
systemic level - altering blood pressure
local level - modulate local blood flow
responds to vasoconstrictors/dilators
elastic tissue in vessles
recoil effect, pressure from expansion drives blood forward, also keeps vessels sprung open
elastic tissue in vessels
recoil effect, pressure from expansion drives blood forward, also keeps vessels sprung open
3 types of capillaries
continuous, fenestrated, sinusoid
types of pressures in capillaries
hydrostatic (out) oncotic (in)
diastole?
filling - atrial valves open, blood flows into ventricles