Making the world better, one answer at a time. The primary germ layers (endoderm, mesoderm, and ectoderm) are formed and organized in their proper locations during gastrulation. Endoderm, the most internal germ layer, forms the lining of the gut and other internal organs. Ectoderm, the most exterior germ layer, forms skin, brain, the nervous system, and other external tissues. Mesoderm, the the middle germ layer, forms muscle, the skeletal system, and the circulatory system.
Eiffel Tower. The Eiffel Tower, located in Champ de Mars in Paris, is a tall wrought-iron structure made by man. It is one of the most famous monuments of the world. It is the most famous landmark of Europe, held the record as the tallest man-made structure of the world from 1889 to 1930 with its height of 324 meters.
In France, the Eiffel Tower is known as La Tour Eiffel or la dame de fer, which means âthe iron lady.. It's an iron lattice tower that stands 984 feet tall (1,063 feet if you include the broadcast antennas at the top). At completion, it passed the Washington Monument as the tallest man-made structure in the world. It held that title until 1930, when the Chrysler Building was built in New York City. The Eiffel Tower remains the tallest building in Paris. It is also the most-visited paid monument in the world.