Pressure in the heart, AS biology

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  • Created by: Terri
  • Created on: 29-11-12 10:16
Preview of Pressure in the heart, AS biology

First 92 words of the document:

Pressure Graph
Atrium contracts = Pressure increases
Blood pushed through atrioventricular valves into ventricle =
Pressure increases
Atrium relaxes = Pressure decreases
Blood pushed into atrium from pulmonary vein = Pressure
increases
Ventricle contracts = Pressure increases
Pressure in ventricle = Pressure in Aorta
When pressure in ventricle exceeds aorta, semi lunar valves
open
Blood forced into Aorta, pressure in Ventricles = pressure in
atrium
Atrium and Ventricles relax
Beats per min:
60 Seconds÷T ime taken to complete one f ull cycle

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