Vertebrates and Invertebrates

derived its name from vertebrae, the series of bones that make up the backbone or the vertebral column subphylum of Chordata, which are bilaterally symmetrical Chordates are named for skeletal structure, the notochord Notochord is a longitudinal, flexible, rod located between the digestive tube and the nerve cord

VERTEBRATES

Invertebrates

phylum Porifera suspension feeders living in both spongocoel pores in the central cavity osculum larger opening choanocytes collar cells (named for the membranous collar around the base of the flagellum consist of two layers

Mesohyl gelatinous region Amoebocytes

SPONGES