Transcript Sponges/Cnidarian

Sponges & Cnidarian
Sponges
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Invertebrates - animals without back bones.
Simplest of the multicellular animals.
No organ system.
Kingdom – animalia
Phylum - porifera
Structure
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Have thousands of
pores which let water
flow through it
continually.
Obtain nourishment and
oxygen from this water.
Obtaining Food
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Collar cells-create a
current of water
through the sponge.
Collect food as water
flows through the
body.
Movement
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Holdfast - root-like attach the sponge to
rocks.
Adult sponges are
sessile - unable to
move on its own.
Reproduction
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Budding
Regeneration
Sexual reproduction
Characteristics of Cnidarian
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Invertebrates
All Cnidarian have
radial symmetry
Have tentacles with
stinging cells.
Movement
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Most cnidarians are slow-moving or
sessile
Found on shallow ocean floors, the
bottom of ponds or drifting about in
water currents.
The two different forms
of a Cnidarian body
Examples of cnidarians
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Jellyfish
Sea anemones
Coral animals
Quiz
Name:_______________
1. How do sponges move?
2. What is an invertebrate?
3. Label only the
blank line.
Name:______________
1.
Name a charactieristic that all
cnidarians have?
2.
How do sponges eat?
3.
Label only the
blank line.
Name:_______________
1.
What is radial symmetry?
2.
Name 2 characteristics all animals
have.
3.
Label the blank
line ONLY.
1.
List 3 ways sponges reproduce.
2.
Give an example of a cnidarian.
3.
Label the blank line
only!