A thick muscular layer is present between the left and right part of the heart called the septum.
Inside the heart both pure and impure blood are present and septum is the basic structure which makes differentiation and prevents the mixing of blood.
Final answer
A thick muscular layer is present between the left and right part of the heart called the septum.
Inside the heart both pure and impure blood are present and septum is the basic structure which makes differentiation and prevents the mixing of blood.