They both contract at the same time.
Both atria open and close simultaneously.
please help me with this question
the atriventriculart node causes both atria to contract
yes
The Sinoatrial Node sends a wave of electric impulses through the heart, which causes both atria to contract.
Resellerrating
Right atrium then right ventricle.
I am not sure, but i think they empty into the chambers.
Nodal or pacemaker cells.
Contraction of both atria
Atria don't do nearly the same amount of work of contraction as do the ventricles. They are therefore relatively thin walled. Most of the blood that flows from the atria to the ventricles flows passively, and so the atria function mostly as a reservoir for blood volume.
Atria don't do nearly the same amount of work of contraction as do the ventricles. They are therefore relatively thin walled. Most of the blood that flows from the atria to the ventricles flows passively, and so the atria function mostly as a reservoir for blood volume.