describe how a mammalian heart is adapted to its function

Answer 1

It has septum which prevents oxygenated blood from mixing with deoxygenated blood

Answer 2

Has valves to prevent back flow of blood 

Answer 3

Has tendons which hold valves in place and prevent inversion of valves

Answer 4

Has a layer of fat which acts as a shock absorber.                                                        _Has semilunar valves which prevents back flow of blood into the ventricles when the ventricles contracts