The structure of a parliamentary system is defined by a fusion between the executive and legislative branches, where the head of government (the Prime Minister) is elected by the parliament and can be removed by it. This system often emphasizes party discipline, as government stability relies on parliamentary support. Unlike presidential systems, where the president serves independently, a parliamentary system fosters collaboration and negotiation between parties. This structure can lead to multi-party systems, coalition governments, and policies reflecting a broader spectrum of public interests, enhancing responsiveness in governance.