The function of the sinoatrial node is to
Afilter lymph.
Bprevent blood from backing up into the atrium.
Ckeep the heart beating.
Ddivide the right and left sides of the heart.
Afilter lymph.
Bprevent blood from backing up into the atrium.
Ckeep the heart beating.
Ddivide the right and left sides of the heart.