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62 Cards in this Set

  • Front
  • Back

Cnidaria

Jellyfish, corals, anemones

Cnidocytes

Stinging cells

Nematocyst

Harpoon on cnidoytes

Characteristic of cnidaria

All have cnidocytes. Hydrostatic skeleton.

Define eumatozoa

Have true tissues. Cnidaria.

Do cnidarids have coeloms

No. Acoelomates

Symmetry of cnidaria

Radial

Body form of cnidaria

Two of them. Polyp and Medusa

Number of openings in body cavity

One

Organs in cnidaria

No organ systems. Do have nerve receptors

Diet of cnidaria

Carnivore

Germ layers in cnidaria

Diploblastic

Gastrodermis

Digests food and secretes enzymes

Use of ectoderm

Protection and structure

Nerve net

In animals with radial symmetry

Solitary corals

Individual polyps, usually one mouth, sessile or benthic

Colonial corals

Polyps joined together, sessile, single mouth

Polyp vs Medusa body form

Polyp cylindrical with tentacle-surrounded mouth up.


Medusa free-swimming with bell shaped body and mouth down. Tentacles on edge of bell.

Polyp reproduction

Corals sexual, jellyfish asexual. Asexual includes budding or splitting of polyp

Reproduction of medusa

Sexual

Nematocyst

Contains folded sensor filled with venom. When stimulated, capsule ejects thread with force, barb penetrates prey.

Zooxanthellae

Sibge-celled algae that live in tissues of animals. Mutualistic. Provides food to coral (products of photosynthesis)

Hydrozoa water type, polyp or Medusa stage, movement and nematocyst.

Class. Marine predators. Can move. Solitary polyp only, gasto cavity like sponges. Not sessile.


Nematocyst either penetrates and injects poison, or recoils and entangles prey

Hydrozoa reproduction.

Sexual and asexual

Example of a hydrozoa and some characteristics

Portuguese man o war. Dactylozooid, gas filled float, gastrozooid, gonozooid

Dactylozooid

Tentacle polyps. Portuguese man o war

Gonozooid

Reproductive polyps

Gastrozooid

Feeding polyps

Scyphozoid

Jellyfish.

Different types of polyp

Dactylozooid


Gastrozooid


Gonozooid

Scyphozoid water type, polyp or Medusa stage, movement and nematocyst.

Jellyfish. Marine, both polyp and Medusa in most, not sessile.

What has four gastric pouches

Scyphozoid.

What has a rhopalium

Scyphozoid

Define rhopalium

Sense organ

Cubozoa example

Class. Includes box jellyfish.

Cubozoa water type, polyp or Medusa stage, movement and nematocyst.

Marine, Medusa stage dominant, not sessile, fatal nematocyst

Anthozoa examples

Class. Includes two orders:


Hexacorallia


Octocorallia


Symbiotic with zooxanthellae

Anthozoa water type, polyp or Medusa stage, movement and nematocyst.

Marine, polyp only, sessile, predator.

Hexacorallia

Order of Anthozoa class. Anemones and hard corals. Calcified exoskeleton

Octocorallia

Order in anthozoa class. Includes soft corals

Hexacorallia water type, polyp or Medusa stage, movement and nematocyst.

Marine, polyp, attached by pedal disc, predator.

Reproduction of hexacorallia

Males and females release gametes


Or


Brooder


Or


Budding


Or


Pedal laceration


Or


Transverse Fission

Define brooder

Male releases sperm to be fertilized in female

Define budding

Mother produces ring of tentacles break off, form new anemone

Define pedal laceration

Piece of foot is severed and grows into new individual

Define transverse Fission

Polyp separate into 2 halves which crawl away grow. Clones

Number of island on great barrier reef

900

How do coral reefs form

Egg and sperm, fertilization, planula, substrate, polyp, secrete calcium carbonate, polyps divide asexually and form colonies

Define planula

Free swimming larvae

Mouth of a hard coral

Ingests food as well as excretes waste

Scleractinia

Stony (hard) corals. Reef builders.

Scleractinia water type, polyp or Medusa stage, movement and nematocyst.

Marine, polyp stage only, sessile, carnivore.

Number of tentacles in scleractinia

Multiples of six

Octocorallia number of tentacles

8 feathery tentacles

Octocorallia water type, polyp or Medusa stage, movement and nematocyst.

Marine, no Medusa, sessile, predator.

Staurozoa water type, polyp or Medusa stage, movement and nematocyst.

Marine, only Medusa, sessile, predator.

Staurozoa reproduction.

Sexual, gamete release.

Which class has panua larvae that crawls instead of walks

Staurozoa class

Environmental concerns of cnidaria

Stinging swimmers, tourism, fisheries, aquaculture

Which cnidarian has sdeonssf venom in animal kingdom

Box jellyfish