Cnidarians Latin for stinging cells Another name: Coelenterates

1
Cnidarians- Latin for stinging cellsAnother
name Coelenterates
2
Radially symmetrical
3
A system of nerve cells called a Nerve net
4
Special nerve cells sting their prey to paralyze
them
5
Medusa Body form like jellyfish arms point
downward
6
Polyp type body form arms reach UP! live in
colonies
7
Two layers of body tissue AND a REAL digestive
system called a coelum
8
ALL have tentacles with stinging cells called
neumatocysts
9
Important indicator species
10
Examples coral anemone, hydra, jellyfish
11
This is an anemone
12
http//www.microscopyu.com/moviegallery/pondscum/c
oelenterata/hydra/index.html
Reproduce by Budding, by regeneration, or by
sexual reproduction
Hydra budding Hydra feeding
13
Many life in colonies and secrete hard calcium
carbonate shell this is the Great Barrier Reef