phylum porifera
porifera
Porifera
the order of the phyla are porifera,annelida Cnidaria,and Echinodermata and many more.
Porifera and Cnidaria
The Porifera, or sponges
All sponges belong to the phylum Porifera.
Porifera: Multicellular with porous bodies, example: sponges. Cnidaria: Radial symmetry, tentacles and stinging cells, example: jellyfish. Platyhelminthes: Flat bodies with bilateral symmetry, example: flatworms. Nematoda: Roundworms with cylindrical bodies, example: roundworms. Mollusca: Soft bodies with a muscular foot, example: snails. Annelida: Segmented bodies, example: earthworms. Arthropoda: Exoskeleton and jointed legs, example: insects. Echinodermata: Spiny skin and radial symmetry, example: starfish. Chordata: Notochord and dorsal nerve cord, example: humans.
porifera & echinodermata
The phylum Porifera (sponges) is an example of animals that have no true tissue layers. They are considered the simplest multicellular animals and lack organized tissues.
All invertebrates except Porifera possess nervous system .
No, they are sponges. Actually they are the only animal phyla that does not have any "true tissues".