Coelentrata Flashcards
What are the two basic body forms of cnidarians?
The two basic body forms are polyp and medusa.
What is the sessile and cylindrical form of cnidarians?
The sessile and cylindrical form is called polyp.
What is the free-swimming form of cnidarians?
The free-swimming form is called medusa.
What is the skeleton composition of corals?
Corals have a skeleton composed of calcium carbonate.
How do cnidarians exhibit digestion?
Digestion in cnidarians is both extracellular and intracellular.
What is the function of nematocysts in cnidarians?
Nematocysts are used for anchorage, defense, and capture of prey.
What type of organization and body cavity do some cnidarians exhibit?
Some cnidarians exhibit tissue level of organization and are diploblastic.
What is the gastro-vascular cavity in cnidarians?
The gastro-vascular cavity has a single opening, the mouth on the hypostome.
What is the name of the phylum that includes cnidarians?
The name of the phylum is Coelenterata.
What are examples of cnidarians?
Examples include Physalia (Portuguese man-of-war), Adamsia (Sea anemone), and Aurelia (jellyfish).
Habitat of coelentrates
Aquatic mostly marine
Symmetry of coelentrates
Radial
Where are cnidoblast and cnidocytes
Present
What do they contain
Tentacled and body
Stinging capsules or nematocyts
What is metagenesis
Alternation of generation (polyp - medusa)
Polyp to medusa?
Asexually
Medusa to polyp
Sexually
Eg that exhibits alteration of generation
Physalia and obelis
Polyp eg
Hydra and adamsia
Medusa eg
Aurelia
Jelly fish
Physalia
Portuguese man of war
Coelentrates
Adamsia
Sea anemone
Coelentrates
Pennatula
Sea pen
Coelentrates
Gorgonia
Sea fan
Coelentrates
Meandrina
Brain coral
Coelentrates
Aurelia
Jelly fish
Coelentrates
