Mention the name of the phylum against the following characteristics

1. No single mouth but numerous pores as water inlets …………… .
2. Jointed appendages …………… .
3. Unsegmented body with a protective calcareous shell …………… .
4. Locomotion by tube feet …………… .
5. Long, cylindrical and unsegmented body …………… .
6. Small, flat, unsegmented worms …………… .

1. No single mouth but numerous pores as water inlets — Porifera.
2. Jointed appendages — Arthropoda.
3. Unsegmented body with a protective calcareous shell — Molluscs.
4. Locomotion by tube feet — Echinodermata.
5. Long, cylindrical and unsegmented body — Nematoda.
6. Small, flat, unsegmented worms — Platyhelminthes.