8.3.2 Rest of Heart stuff

What does the septum do?

prevents oxy & deoxy blood mixing

What do valves do?

prevents backflow of blood

The v__’s walls are t__ than the atria’s as more p__ is needed to pump b__ out the heart

ventricle, thicker, pressure, blood

the __ ventricle is t__ than the __ ventricle bc the right ventricle only pushes blood → l__ (less o__ to flow than left → o__)

left, thicker, right, lungs, opposition, organs

Cardiac cycle: __ __
> both a__ c__
> blood flows from a__ → __
> v__ in v__ closed
> __ pressure > __

atrial systole, atria contract, atria, ventricles, valves, veins, atria, ventricle

Cardiac cycle: __ __
> both v__ c__
> blood flows from v__ → __
> a__ v__ closed
> __ pressure > __

ventricular systole, ventricles contract, ventricles, arteries, atrioventricular, valves, ventricle, atria

Cardiac cycle: __ __
> a__ & v__ r__
> s__ valves close

ventricular diastole, atria, ventricles relax, semilunar

__ causes valves to shut

pressure

atrial systole

ventricular systole

diastole

Control of heartbeat
> is m__: c__/r__ even w/__ s__
> r__ a__ wall has s__ n__ (S__) which c__ = e__ impulses that s__ across a__ walls = atrial muscles c__ i.e. a__ s__ (faster than rest of heart muscle)
> e__ reaches a__ n__ (A__) & is d__
> after delay, goes thru fibres of P__ t__ & down the s__ & up v__ walls = ventricles contract i.e. v__ s__
> another delay before next wave from S__ = heart muscles r__ i.e. d__

myogenic, contracts, relaxes, out stimulation, right atrium, sinoatrial node, SAN, contracts, electrical, spread, atrial, contract, atrial systole, excitation, atrioventricular node, AVN, delayed, Purkyne tissue, septum, ventricle, ventricular systole, SAN, relax, diastole

1: __
2: __
3: __

SAN, AVN, Purkyne tissue