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Unit 4:
Inve
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rate
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THE SIMPLEST INVERTEBRAT
ESPorifera and Cnidaria
THE SIMPLEST
INVERTEBRATES
Porifera:Live in the sea
Their bodies are full of pores and channels
They feed by filtration
THE SIMPLESTINVERTEBRATE
SFeeding of the Porifera:
Osculum
Pores
Water
Central cavity
The water enters though the central cavity and leaves through a hole called osculum
THE SIMPLESTINVERTEBRATE
SCnidaria:Radial Symetry
Soft body with tentaclesA gastrovascular cavity connected to the mouthNutricion. Cnidaria are carnivorous
THE SIMPLEST
INVERTEBRATES
Cnidaria:Live in the seaReproduction. In their lifetime, cnidaria usually pass through both two stages:
THE SIMPLEST
INVERTEBRATES
Reproduction of Cnidaria:Stages:
Polyp Medusa
Asexual Sexual
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