1.5M ratings
277k ratings

See, that’s what the app is perfect for.

Sounds perfect Wahhhh, I don’t wanna
biomedicool

My heart skip skips a beat

biomedicool

HEARTBEATS!!

image

The pause is to allow the atria to fully empty into the ventricle.

Heartbeat on an ECG trace

image

P Interval (Ventricular Diastole)

  • Atria and ventricles are relaxed
  • blood is flowing into the atria from the veins.
  • Atrial pressure increases above that of the ventricle, AV valves open allowing blood to flow into the ventricle

P Wave (Atrial Systole) P-Q

Signal transduction from SA to AV nodes.

  • SA node fires
  • Atria contract causing atrial systole
  • which forces all blood into the ventricles
  • emptying the atria.

Q Interval (End of Ventricular Diastole)

Depolarisation of interventricular (IV) septum

  • AV valves remain open - all remaining blood squeezed into the ventricles.
  • impulse from the SA node reaches the AV node
  • which spreads the signal throughout the walls of the ventricles via bundles of His and Purkinje fibres
  • R peak is the end of ventricular diastole and the start of systole.

R Interval (Ventricular Systole)

Ventricular contraction

  • All blood is now within the ventricles
  • so pressure is higher than in the atria - AV valves close
  • ventricles start to contract although pressure is not yet high enough to open the SL (semilunar) valves

ST Segment (Ventricular Systole)

Ventricular contraction

  • Pressure increases until it equals Aortic pressure,
  • SL valves open
  • blood is ejected into the Aorta (and pulmonary artery) as ventricles contract
  • At this time the atria are in diastole and filling with blood returning from the veins.
  • plateau in ventricular arterial pressure

T Wave (Ventricular Diastole)

T= moment of Ventricular repolarisation immediately before ventricular relaxation

  • Ventricles relax
  • ventricular pressure is once again less than the aortic pressure
  • so SL valves close
awholebunchobananas
awholebunchobananas

image
image
image
image
image
image

You never really know a man until you’ve seen into his 10,000 eyes


Additional notes:

- Crowley would sleep in the nude, but I’m trying to keep it Tumblr safe

- Aziraphale wouldn’t own any pajamas at all (not sleeping and all), but if he did, you know it would still be the comfortable and convenient (albeit unfashionable) nightshirt

hereditary enemies good omens amazing funny
strangelyineffable
forineffablereasons

ineffablelesbians replied to your post “there’s this weird element to discorporated aziraphale in the bar that…”

aziraphale honing in to astral project exactly where crowley is just by ? feeling? he’s there? the power of gay love

aziraphale can’t even see crowley when he shows up to make sure he’s in the right place he’s just like “this one smells like gay pining and soot and alcohol must be mine” 

hereditary enemies good omens