The sinoatrial node initiates the cardiac cycle.
What is the correct order in which the chambers of the heart contract?
1 )
atria and ventricles at the same time
both atria then both ventricles
3 )
left atrium, then left ventricle, then right atrium, then right ventricle
4 )
right atrium, then right ventricle, then left atrium, then left ventricle
تحلیل ویدئویی تست
تحلیل ویدئویی برای این تست ثبت نشده است!