Obtain a preserved starfish and rinse off any preservative with water. Place the starfish in the dissecting pan with its dorsal or aboral (top) surface upward. Observe the starfish and determine its symmetry. Locate the central disc in the center of the starfish.Count and record the number of arms or rays the starfish has. Locate the small, round hard plate called the madreporite on top of the central disc. Water enters through this into the water vascular system. Label the central disc, arms, and madreporite on Figure 1.btain a preserved starfish and rinse off any preservative with water. Place the starfish in the dissecting pan with its dorsal or aboral (top) surface upward. Observe the starfish and determine its symmetry. Locate the central disc in the center of the starfish.
History. The third largest city in France, Lyon is situated in the Rhone-Alpes region between Paris and Marseille. A UNESCO World Heritage site, the city is home to roughly 490,000 inhabitants and was prized in ancient times as a major centre for the production and sale of silk.istory. The third largest city in France, Lyon is situated in the Rhone-Alpes region between Paris and Marseille. A UNESCO World Heritage site, the city is home to roughly 490,000 inhabitants and was prized in ancient times as a major centre for the production and sale of silk.
Gare de Lyon is one of the six main railway stations in Paris, France. It was built in 1895-1902 to replace the old landing stage of Lyon and It was named after the city of Lyon, which is a stop for many long-distance trains departing from the station, most of which operating towards the south of France.n general most services run to the south and east of France (TGV Trains to Southern France, the Alps, Basel in Switzerland and Rome in Italy). Gare de Lyon also hosts regional trains and the RER. Click here to book your transfer from Orly Airport to Gare de Lyon.