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Spiral galaxies and spiral means other body parts that stick out and move.
Spiral galaxies.
i think it is called the North Central Region because it is located in the North Central. :)
The central region of an atom is called the nucleus. The nucleus consists of many neutrons and protons which can form bonds.
The central region of the sun is called the core.
Meseta
nucleus
The galactic centre is the central region of a galaxy. Most, if not all galaxies have a supermassive black hole at their centre.
Someone left a foolish answer here, and the question is unnecessary and poorly-defined, too.
It is called a sector.
The region is commonly called Tornado Alley.
Medulla (which is the term for the central region of many other things as well.