Watch this video entitled Sponges, Anemones, Corals and Flatworms Part 1 and discover the characteristics of protozoans, parazoans, and primitive metazoans
Learn how the Swedish botanist Linneaus divised a system to categorise and group organisms, by similarities and differences in primary characteristics and systems, such as digestive, skeletal, and nervous systems. Take a closer look at the phylum Porifera or Sponges.