Cnidarians/Ctenophores Bio-Maretka

Cnidaria

Stinging Cell

Coelenteron

Hollow Gut

Cnidocytes

The stinging cell of a "cnidarian" contains a coiled filament with a poisonous barb at the end

Cnidocil

trigger of a cnidocyte

Nematocyst

A thread-like filament with a poisonous barb at the end… found in a cnidocyte

Radial Symmetry

Can be divided into two equal halves along any plane through a central axis

Medusa

"Bell-shaped" body plan

Polyp

"Vase-shaped" body plan

Nerve Net

Simple nervous system in cnidarians.

"Zoa"

Animals

Hydrozoa

"Water Animal" / Polyp & Medusa / Marine & Fresh

"Sea-Serpent"

"Hydros" (Hydrozoa)

Scyphozoa

"Cup-Animal" / Medusa / Marine & Fresh / "Drifters" / Nerve Net

"Cup-Animal"

Scyphozoa / Jellyfish

Anthozoa

"Flowering Animal" / Marine/ Polyp / Basal Disk

Flowering Animal

Anthozoa / Sessile

Cubozoa

"Cubed-Animal" / Marine / Medusa / Potent Venom

"Cubed Animal"

Cubozoa

Hermaphrodite

an organism that has both male and female reproductive organs

Testis

male reproductive organ / part of hermaphrodite

Ovary

female reproductive organ / part of hermaphrodite

Basal Disk

Foot-like pad that attaches to substrates or Calcium Carbonate Skeletons

Planula

larval stage of a hydrozoan

Budding (Bud)

Asexual reproduction… sometimes used by cnidarians

Sessile

Describes an organism that remains attached to a surface for its entire life and does not move

Ctenophora

Comb-Holder

Colloblast

a specialized cell that secretes a sticky substance (used to capture prey)

Biradial

a symmetrical combo of bilateral and radial

Apical Organ ("statocyst")

"Sensory organ"… gives a sense of body orientation in water

Bioluminescence

Ability to produce light, usually when disturbed