What separates the upper and lower heart chamber?

Answer 1

The atrioventricular valves: Right side is the tricuspid and the left side is the bicuspid.
The Fibrous AV ring
The atrioventriculal (A-V) valves, namely the mitral valve and the tricuspid valve, separate the atria from the ventricles.

Answer 2

the chambers = ventriculus dexter and sinister (in latin) are separated by a wall called septum interventriculare.

this wall has got two parts: septum membranaceum (it's weaker and without muscles, this is the upper side of the septum interventriculare) and septum musculare, which is with muscles.

Answer 3

The four chambers of the heart are separated with the help of the valves that prevent back flow of blood. Also, the left and the right chambers of the heart are separated by the atrioventricular septum.

Answer 4

The right side of the heart (right ventricle [lower] and atrium [upper]) are separated from the left side of the heart (left ventricle [lower] and atrium [upper] by the interventricular septum.
The mitral valve and the tricuspid valve.

Answer 5

An inter Atrial septumseparatestwo Atria. An inter Ventricular septumseparates two Ventricles. Right Atrio-Ventricular septum separates right Atrium from Ventricle. This septum contains a Tricuspid valve. Which allow a flow of blood from right Atrium to right Ventricle.Left Atrio-Ventricular septum separates left Ventricle from left Ventricle. This septum contains left Atrio-Ventricular valve. Also called Mitral valve.Then you have two additional valves. One in Pulmonary Aorta called as Pulmonary valve. One in Systemic Aorta called as Aortic valve. They both allow flow towards aortas and not backwards.

Answer 6

The heart is made of four chambers. The heart is separated with the help of a dividing wall of muscles.

Answer 7

the right atrium duhhh dummies

Answer 8

the Septum