It is important to maintain control and power and it makes sure one branch doesnt become too powerful
judicial- the judical branch can check the executive branch by declaring an action as unconstitutional
the judicial branch can check the legislative branch by interpreting laws and declaring if they are constitutional
this is important to make sure that no branch performs uncontitutional actions and helps to make sure no laws are unfair to the citizens
legislative-
checks judicial by impeaching judges
it can check executive by overriding presidential veto
executive-
executive branch can check judicial by appointing judges to fill vacancies
checks legislative by recommending legislation