Understanding your blood oxygen levels when you are at rest is something that you need to do if you want to make the most of the oxygen that's entering your body. Normal blood oxygen levels for the average American is about 90 to 100 percent oxygen saturation.
Chief of State. Every nation has a chief of state, a person who serves as the symbolic leader of the country and represents the nation. In the United States, the president both leads the government and acts as the chief of state, although this is not the case in many countries.
The executive branch of our Government is in charge of making sure that the laws of the United States are obeyed. 1  The President of the United States is the head of the executive branch. The President gets help from the Vice President, department heads (called Cabinet members), and heads of independent agencies. Here are some of the things those people do: 1  The President leads the country and commands the military. 2  The Vice President becomes President if the President can no longer do the job and is also President of the Senate. 3  Department heads advise the President on issues and help carry out decisions made by the Government.