None. (Well, arguably the interior of Panama itself). Any region "connected" with the US east coast via the canal was already "connected" via the Straits of Magellan.
The canal did cut the sailing distance (and therefore the trip time) to the US west coast approximately in half, though.
The Panama Canal
on the eastern (Atlantic/Caribbean) coast of Panama. .. the eastern end of the Panama Canal
The panama Canal.
The Erie Canal connects NYC to Buffalo and the Great Lakes.
true
They had to cross the East Coast of the U.S.A to West coast.
Without the Panama Canal, ships going from the east coast of the United States to the west coast, or vice-versa, would have to sail all the way around the southern tip of South America. Taking the shortcut through the Panama Canal saves thousands of miles and days of sailing time.
so ships from the atlantic coast wouldn't have to travel around south america to get to the pacific ocean
Only if your arms are very long.
It facilitated travel and shipping between the east coast and west coast of the United States.
It can be said that the Panama Canal has benefited every country in Central America because the Panama Canal provides a way to go through North America and South America. If it wasn't there, you would have to go around South America to get past North or South America by boat.
The panama Canal was constructed to make a shipping route faste. The United States got involved in the Panama Canal to make it easier to move fleets of war ships from one coast to the other without having to go around South America.