characteristics of Coelenterata in pointwise
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#All coelenterates are aquatic, mostly marine.
#The bodyform is radially symmetrical, diploblastic and does not have a coelom. #The body has a single opening, the hypostome, surrounded by sensory tentacles equipped with either nematocysts or colloblasts to capture mostly planktonic prey.
#The bodyform is radially symmetrical, diploblastic and does not have a coelom. #The body has a single opening, the hypostome, surrounded by sensory tentacles equipped with either nematocysts or colloblasts to capture mostly planktonic prey.
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* Cnidaria are so known as Coelentrata.
* This name of cnidaria is due to single cavity Coelenteron .
→ Cnidarian have tissue but don't have organ or organ system. That's why they posses tissue level of organization.
→ They are Radially symmetry and Diploblastic.
* Radial Symmetry :- The body can be divided into two equal halves by a single plane passing through the centre from top to bottom.
* Diploblastic :- Animals in which two layers namely endoderm and ectoderm are present are known as Diploblastic animals.
→ No separate body cavity.
→ They have incomplete digestive system. It has a single aperture mouth but don't have anus.
→ They respire through body surface by diffusion.
→ They excrete through body surface by diffusion.
→ Segmentations are absent in them.
→ Tentacles are present in them which act as appendages.
→ They are mostly marine, aquatic animals and free-living animals.
→ They reproduce both sexually and asexually.
→ Ex :- Sea-pan, Sea-fan, Brain coral etc.
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* Cnidaria are so known as Coelentrata.
* This name of cnidaria is due to single cavity Coelenteron .
→ Cnidarian have tissue but don't have organ or organ system. That's why they posses tissue level of organization.
→ They are Radially symmetry and Diploblastic.
* Radial Symmetry :- The body can be divided into two equal halves by a single plane passing through the centre from top to bottom.
* Diploblastic :- Animals in which two layers namely endoderm and ectoderm are present are known as Diploblastic animals.
→ No separate body cavity.
→ They have incomplete digestive system. It has a single aperture mouth but don't have anus.
→ They respire through body surface by diffusion.
→ They excrete through body surface by diffusion.
→ Segmentations are absent in them.
→ Tentacles are present in them which act as appendages.
→ They are mostly marine, aquatic animals and free-living animals.
→ They reproduce both sexually and asexually.
→ Ex :- Sea-pan, Sea-fan, Brain coral etc.
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