It is the most important organ.
It is also known as the enforcement wing
It consists of 15 members, 5 of which are permanent members ( USA, UK, France, People's republic of China, The Russian Federation )
The 10 non-permanent members are elected for 2 years.
It has the responsibility of maintaining peace and security.
Decisions are taken by at least 9 members including all 5 permanent members
A negative vote from by any one of the permanent members would lead to a cancellation of the resolution. This is known as veto