The electrical system of your heart is the power source that makes this possible. The impulse starts in a small bundle of specialized cells located in the right atrium, called the SA node. The electrical activity spreads through the walls of the atria and causes them to contract. This forces blood into the ventricles.
“The Big Apple” is a nickname for New York City. It was first popularized in the 1920s by John J. Fitz Gerald, a sports writer for the New York Morning Telegraph. Its popularity since the 1970s is due to a promotional campaign by the New York Convention and Visitors Bureau, known now as NYC & Company. In the Midwest, the town of Manhattan, Kansas, locals have taken to referring to the area as ‘The Little Apple.’