Chapter 7 Lab Practical
Porifera, Cnidaria,
Ctenophora, Mollusca
Porifera Skeleton and Cells
Porifera Water Flow
Porifera Organization and Morphology
Asconoid – simplest
type; shaped like a
tube or vase with a
single osculum
Porifera Organization and Morphology
Syconoid – larger
type with series of
canals
Porifera Organization and Morphology
Leuconoid – most
complex and most
common; numerous
canals that lead to
chambers
Class Hexactinellida
glass sponge; ex: Euplectella – Venus’s flower basket
Cnidarian Characteristics
• Contain stinging cells called cnidocytes in their
tentacles that contain coiled stingers called
nematocysts that can shoot out & paralyze prey
Cnidarian Body Plan
• have 2 basic body forms: polyp and medusa
Cnidarian Life Cycle
Class Hydrozoa
• Portuguese man-of-war (Physalia physalis)
Class Scyphozoa
Aurelia aurita
(Moon Jellyfish)
Class Scyphozoa
Chrysaora fuscescens
(Pacific Sea Nettle)
Class Anthozoa
Stony Corals (Branching Coral and Doming Coral)
Class Anthozoa
Gorgonians
(Sea Whips and Sea Fans)
Class Cubozoa
Box Jellyfish
Phylum Ctenophora
Sea Gooseberry
Class Polyplacophora
• ex: Chiton
Class Gastropoda
• ex: Abalone
Class Gastropoda
• ex: Nudibranch (sea slug)
Class Bivalia
• ex: Oysters
Class Bivalia
• ex: Scallops
Class Bivalia
• ex: Clams
Adductor
Class Cephalapoda
• Chromatophores in the skin can help change color
for camouflage
Class Cephalapoda
• Use their radula & beak to feed
beak
radula
Class Cephalapoda - Squid
Class Cephalapoda - Octopus
Class Cephalapoda – Cuttlefish
Class Cephalapoda – Chambered Nautilius
Chapter 7 Test Study Guide
Porifera, Cnidarian, Ctenophores, Mollusks
•Vocab from the terms in the Lab Practical
•Symmetry types
•Classification (classes found in each Phylum)