Introduction to Phylum Chordata 1.      Bilaterally symmetrical, coelomate, triploblastic with organ level organization. 2.      Characteristic feature – presence of notochord, which is a dorsal hollow nerve cord and paired pharyngeal gill slits 3.      Presence of post-anal tail 4.      Closed circulatory system is seen Phylum Chordata is further classified into three sub-phyla namely, Urochordata or Tunicata,…