Porifera
Phylum for sponges which have one true tissue layer
Oscula
Big water opening for water flowing out
Ostia
Small water opening for water flowing in
Choanocytes
Flagellated cells for eating
Clacerea
Sponges which can be asconoid, syconoid or leuconid and are make of calcium carbonate
Hexactinellida
Glass sponges which are siliceous and have 6 rayed spicules and can be sycnoid or leuconoid
Demospongaie
Most sponges which are made of spongin and/or siliceous spicules and are only leuconoid
Cnidaria
Jelly fish/anemone Phylum which have two true tissue layers
Mesoglea
Jelly stuff of jelly fish
Nematocysts
Stingers on jelly fish
Hydrozoa
Polyp and mesusae jelly fish
Anthozoa
Seas anemones and coral which are sessile polyps
Scyphozoa
True jellyfish which are only medusae
Gastrozoids
Organ for food in jellies
Gonozoids
Organ for sex in jellies
Platyhelminthes
Phylum for flat worms, tape worms and flukes - are parasitic
Cephalized
Having a head
Annelina
Phylum for Sea worms and earth worms which are segmented
Setae
Bristles on worms
Clitellata
Earth worms which are hermaphroditic
Polychaeta
Sea worms very bristly with seperate sexes
Parapodia
Arms used for increased surface area for gas exchange
Clitellum
Saddle used for reproduction
Mollusca
Chiton, paua, snails and quid phylum
Polyplactophora
Chiton - 8 plates and seperate sexes
Mantle
Skirting of shell thing
Ctinida
In mantel cavity and are used for respiration
Radula
Tongue used for scraping in nails and chiton etc
Gastropodia
Class for snails, slugs which undergo torsion and don't have ctenidia
Operculum
door on the foot of snails
Bivalvia
Muscles and clams - means two shells and do not have a radula
Cephalopoda
Squid and Octopus, have tentacles instead of a foot
Arthropoda/Crustacea
Phylum/subphylum for shrimp, crabs and barnacles which lose their shells, are segmented and have the 5,8,6 appendages
Decapoda
Class for shrimp, crab and lobster - have claws, and gills of thoracic legs
Copepoda
Class for plankton
Cirripedia
Class for barnacles which use cirri for feeding and breathing
Carapace
Top shell
Echinodermata
Phylum for star fish and cucumbers which have 5 part radial symmetry, no brain and tube feet
Asteroidea
Normal star fish
Ophiuroidea
Brittle starts which have a clear disk in the centre and don't use their tube feet to move
Echinoidea
Kina with a skeleton called test, pedicellariae and Aristotle lantern for eating
Holothuroidea
Sea cucumbers which have fronds in its mouth
Ampullae
Water tube feet
Urochordata
Subphylum for sea squirts
Ascidiacea
Sea squirt which has a tunic and pharyngeal slits