The judiciary plays a crucial role in upholding constitutional law, acting as a guardian of rights and liberties. Courts interpret the constitution and ensure that laws align with its principles, protecting citizens from government overreach. Judicial review allows the judiciary to assess the constitutionality of legislation and executive actions, reinforcing the rule of law. By resolving disputes and enforcing constitutional protections, the judiciary serves as a check on the other branches of government. This function is essential for maintaining democracy, ensuring that all actions are subject to constitutional scrutiny and accountability.