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.
Visit the Eiffel tower and learn more about its history and amazing technology. The Eiffel Tower in Paris was built by Gustave Eiffel in just 26 months. It took 18,038 parts, 3,000 workshop drawings, 700 engineering plans and 2,500,000 rivets to raise this structure weighing 7,300 tons and measuring 1,050 feet high. The Cineiffel is a room with unusual images of the Eiffel Tower. 2  The Totem, a series of 8 television screens invites you to a higher space to discover the magic box of virtual images depicting Gustave Eiffel and his Tower. 3  An electronic telescope to discover Paris in all its detail.