Shared Flashcard Set

Details

The Heart
Mechanical properties and phases
9
Biology
Undergraduate 1
09/14/2011

Additional Biology Flashcards

 


 

Cards

Term
systole
Definition
-contraction (increases blood pressure within an enclosed chamber)
Term
diastole
Definition
-relaxation (decreases blood pressure within an enclose chamber).
Term
end diastolic volume
Definition
-the maximum amount of blood a ventricle will hold 130ml
Term
end systolic volume
Definition
-amount of blood in the ventricles when the semi lunar valves close following ventricular systole.
Term
stroke volume
Definition
-the volume of blood ejected at maximal ventricular contraction. 80ml
SV= EDV-ESV
Term
isovolumentric contraction
Definition
-period when the ventricles contract, but no movement of blood flows into the arteries. All heart valves are closed.
Term
isovolumetric relaxation
Definition
-period when the ventricles relax with no movement of blood from the atrium into the ventricles (pressure in ventricles still higher in atria) but valves are closed.
Term
Phase 1
Definition
-Ventricular filling and atrial systole
-AV valves are open and the semilunar valves are closed. Blood passively flows from the atria into the ventricles filling them to 70%
-all chambers are relaxed and partially filled with blood
Term
Phase 2
Definition
-ventricular systole
Supporting users have an ad free experience!