Echocardiogram. Guide. An echocardiogram (also called an echo) is a type of ultrasound test that uses high-pitched sound waves that are sent through a device called a transducer.The device picks up echoes of the sound waves as they bounce off the different parts of your heart.chocardiogram. Guide. An echocardiogram (also called an echo) is a type of ultrasound test that uses high-pitched sound waves that are sent through a device called a transducer.
The United Nations is an international organization designed to make the enforcement of international law, security, economic development, social progress, and human rights easier for countries around the world.rior to the United Nations (UN), the League of Nations was the international organization responsible for ensuring peace and cooperation between world nations. It was founded in 1919 to promote international cooperation and to achieve peace and security..
Like most organizations, the UN was formed in order to meet certain goals and purposes. Article I of the Charter of United Nations specifies the purposes of the UN. The Charter of United Nations (UN Charter) is the UN's governing document, much like the Constitution of the United States of America. The UN Charter sets out four main purposes: 1  Maintaining worldwide peace and security. 2  Developing relations among nations. 3  Fostering cooperation between nations in order to solve economic, social, cultural, or humanitarian international problems. 4  Providing a forum for bringing countries together to meet the UN's purposes and goals.