Best Answer: VASCULAR SYSTEM NOT AMBULACRAL SYSTEM!!!! Echinoderms are characterized by a unique coelomic water vascular system. This is a hydraulically controlled system consisting of a circumoral ring around the esophogus with connecting radial canals each leading to an ambulacrum.The radial canals in crinoids run along each arm into an ambulcral groove and tube feet.f the radial canals run down the ambulacral grooves and are not covered by plates then the system is considered open, if the radial canals are primarily internal and externalized through pores, the system is closed. Source(s): mayor r Â· 8 years ago.
Lyon is a city found in Rhone-Alpes, France. It is located 45.75 latitude and 4.85 longitude and it is situated at elevation 173 meters above sea level. Lyon has a population of 472,317 making it the biggest city in Rhone-Alpes. It operates on the CEST time zone.
Roman Catholic Archdiocese of Lyon. The Roman Catholic Archdiocese of Lyon (Latin: Archidioecesis Lugdunensis; French: ArchidiocÃ¨se de Lyon), formerly the Archdiocese of LyonâVienneâEmbrun, is a Roman Catholic Metropolitan archdiocese in France. The current Cardinal Archbishop is Philippe Barbarin.