Completar Frases LIVING THINGS' CLASSIFICATIONVersión en línea Complete the text about animals por Lauri Lala 1 echinoderms five molluscs porifera mammals vertebrates invertebrates birds arthropods reptiles spinal amphibians annelids fish cord coelenterates Animals can be classified into , if they have a spinal cord and , if they do not have a . There are groups of vertebrates animals : , , , and . Invertebrate animals are classified into six groups : , , , , , and .