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Invertebrates (PORIFERA or sponges (The Skeleton of some sponges are…
Invertebrates
PORIFERA or sponges
The Skeleton of some
sponges are made of spongin
They are composed of
tiny pores
Sponges feed by filtration
Cnidarians
Capture their prey
with a paralising poison.
Are divivaded in two groups
Polyps
Structure in form of
suction cup
Sac-like
Hole spurred
by tentacles
Jellyfish
Float in the water
Umbrella-shaped body
Use a hole as a
mouth and anus
Are carnivorous
What are they?
They have no backbone
Asymmetry or symmetry
Whithout Skeleton or with Skeleton
Worms
Annelids
Soft and long
Citellium forms a cocoon
(soft covering)
to protect the fertilize eggs
Divided into ring
Platyhelminthes
Prasites (Tenia)
Reproduce sexually
and hermafrodites
Acuatics
Nematodes
Cilyndrical bodies
(not divided into rings)
Reproduce Sexually
Free-living
Molluscs
Muscular foot
They have a mantle cavity
Tipes
Bivalves
(mussels)
Cephalopods
(Squid)
Gastropods
(garden snails)
Their bodies are soft and
are not divided in rings
Invertebrates with a Shell
Anthropods
Tipes:
Insects, Arachnids, Crustaceans
Segmented bodies
(head, tórax, abdomen)
They have exoskeleton
Jointed appendages
Armored animals