The upper chambers are called the atria respectively right and left atrium.The lower chambers in your heart are called the left ventricle and the right ventricle. Answer: The heart is made up of four interior chambers. There are two upper and two lower chambers which create the muscle.
There's a chance it was China. Today, the U.S. has an open-trade policy with China, which means goods are traded freely between the two countries, but it wasn't always this way. On February 21, 1972, President Richard M. Nixon arrived in China for an official trip. He was the first U.S. president to visit the People's Republic of China since it was established in 1949. This was an important event because the U.S. was seeking to improve relations with a Communist country during the Cold War.
On April 30, 1970, President Richard Nixon asks the American people to support his decision to send troops into Cambodia in response to North Vietnamâs invasion of the country.n April 30, 1970, President Richard Nixon asks the American people to support his decision to send troops into Cambodia in response to North Vietnamâs invasion of the country.