I think it is called the Septum.
It is the SEPTUM
the wall that divides heart cavity down middle is... septum...this is the TRUE answer... I hope thi helped you=}.
the septum divides the teo ventricles of the heart.
The atrial septum divides the left and right atria of the heart. The intraventricular septum divides the left and right ventricles of the heart.
The section of the heart that divides the left and right side of the heart is called the interventricular septum.
The septum
It is called line symmetry when we can actually draw a line down the middle of a figure that divides the figure into two mirror images.
Intraventricular septum
The septum divides the left and right sides of the heart.
fertilization zygote divides gastrulation placenta forms
the middle of something divides it into two equal parts not the center because the center divides it into 4 equal parts
Diaphragm