Biological Classification - The Porifera & Cnidaria

The video tutorial explores two phyla: Porifera and Cnidaria. Porifera, or sponges, are aquatic multicellular animals with bodies full of pores for water circulation, lacking true tissues and systems. Cnidaria, including jellyfish, corals, and sea anemones, are aquatic animals with stinging cells called cnidocytes. They have a jelly-like mesoglea between cell layers and exhibit radial symmetry. Cnidarians have two life cycle forms: the medusa and the polyp.

How do the body structures of sponges and cnidarians differ?

Explain the two basic body forms of cnidarians and their significance.