prodighyk6723 prodighyk6723

09-02-2024
Health

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For a heart contraction, four structures must be fired in sequence. The sequence is __.
a) Atria, ventricles, SA node, AV node
b) SA node, AV node, atria, ventricles
c) AV node, SA node, ventricles, atria
d) Ventricles, atria, AV node, SA node

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