1. Turn the seastar over to its ventral or oral surface (underside). 2. Locate the mouth in the center of the central disc. Find the ring of oral spines surrounding the mouth. 3. Find the groove that extends down the underside of each arm. This is called the ambulacral groove.. Locate the central disc in the center of the seastar. Locate the small, round hard plate called the madreporite on top of the central disc. Water enters through this into the water vascular system.
Lyon or (more archaically) Lyons (UK /liËËÉn/ or /ËliËÉn/; French pronunciation: [ljÉÌ], locally: [lijÉÌ]; Arpitan: Liyon [ÊjÉÌ]) is a city in east-central France, in the Auvergne-RhÃ´ne-Alpes region, about 470 km (292 mi) from Paris and 320 km (199 mi) from Marseille. Inhabitants of the city are called Lyonnais.
The municipality (commune) of Lyon has a population of 491,268 (January 2011) and is France's third largest city after Paris and Marseille. Lyon is the seat of the metropolis of Lyon, and the capital of both the Rhone-RhÃ´ne alpes region and The rhone. rhÃ´ne departement dÃ©partementourism is an important part of the Lyon economy, with one billion euros in 2007 and 3.5 million hotel-nights in 2006 provided by non-residents. Approximately 60% of tourists visit for business, with the rest for leisure.