Phylum Cnidaria

Sessile, tube shaped body form of cnidarians such as corals and hydra.

• Polyp

• Medusa

Free swimming, umbrella shaped body with tentacles that hang down.

• Polyp

• Medusa

What type of symmetry do all Cnidarians possess?

• Asymmetry

• Radial

• Bilateral

What are the stinging in predatory cnidarians called?

• Amoebocytes

• Porocytes

• Nematocysts

• Nerve Net

What type of cnidarian is pictured?

• Jellyfish

• hydra

• sea anemone

• coral

What type of cnidarian is pictured?

• hydra

• coral

• jellyfish

• sea anemone

In Cnidarians, where does digestion occur?

• spongocoel

• nematocyst

• gastrovascular cavity

• tentacles

How do cnidarians absorb oxygen from the water and expel carbon dioxide?

• Through their tentacles

• Through diffusion

• By using their nematocysts

• By using their respiratory organs

How are nervous responses in cnidarians controlled?

• by their gastrovascular cavity

• through the mesoglea

• by the nerve net

• through the filaments in their nematocysts

How do cnidarians reproduce?

• only sexually

• only asexually

• both sexually and asexually

• genetically reproduced in labs