Dept. of Zoology – Topic- Water vascular (ambulacral) system in echinoderm (Asterias) May 2, 2020 B N College Prepared by- Dr. Rajesh Kumar Assistant Professor Department of Zoology B.N. College Bhagalpur Contact No.- 70040720016 Whatsapp No.- 7677189610 Page 1 / 3Zoom 100%Page 1 / 3Zoom 100%