What is the difference between parliamentary and presidential government?

1. In the parliamentery system the Head of Government and the Head of the country are different. For example in India the Head of the Government is Prime minister (Shri Manmohan Singh). And in the Presidential system the Head of the Government and the Head of the Country is same person. For example in United State America the Head of the Government and the Head of the Government is U.S.A's President. (Mr. Brak Obama)

2. Presidential system is depend on Separation of Power but Parliamentery system doesn't.

a) In Parliamentary system the three pillars i.e the Legislature, Executive & the Judiciary are inter-dependent. Whereas in Presidential system all the three pillars work independently & thus they are not responsible to each other.

b) In the parliamentary form of Govt. the Prime Minister suggests the names of Ministers to the President, who formally appoints them. The ministers have to be the members of either house; if they are not they have to get elected within period of six months. On the other hand in a Presidential system, the ministers are not the members of the legislature. The President's cabinet comprises of members who are experts. They are accountable not to legislature but to the President. c) Also there is a difference in their elections.