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![Page 1: Presentación1](https://reader035.fdocuments.in/reader035/viewer/2022070319/557dbd51d8b42a11428b5423/html5/thumbnails/1.jpg)
Unit 4:
Inve
rteb
rate
s
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THE SIMPLEST INVERTEBRATES
Porifera and Cnidaria
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THE SIMPLESTINVERTEBRATES
Porifera:Live in the sea
Their bodies are full of pores and channels
They feed by filtration
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THE SIMPLESTINVERTEBRATES
Feeding of the Porifera:
Osculum
Pores
Water
Central cavity
The water enters though the central cavity and leaves through a hole called osculum
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THE SIMPLESTINVERTEBRATES
Cnidaria:Radial Symetry
Soft body with tentaclesA gastrovascular cavity connected to the mouthNutricion. Cnidaria are carnivorous
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THE SIMPLESTINVERTEBRATES
Cnidaria:Live in the seaReproduction. In their lifetime, cnidaria usually pass through both two stages:
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THE SIMPLESTINVERTEBRATES
Reproduction of Cnidaria:Stages:
Polyp Medusa
Asexual Sexual