Well there are infact 2 walls. There is the atrial septum which separates right and left atriums. And there is the ventricular septum which separates the right and left ventricles.
I'm not quite sure if if it's asking you for two or one answer, but maybe writing both shall help.
The average male American mens height is 177 cm, which is 69.7 inches, which is approximately 5 foot – 10 inches tall. (for white males*). A height chart for men of "White" race/ethnicity*, showing average height changes with age. (hint: 5 feet tall is 60 inches or 152 centimeters.
