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Echinoderms (Classification (Sea lilies, Sea cucmbers, Bittle stars, Sea…
Echinoderms
Classification
Sea lilies
Sea cucmbers
Bittle stars
Sea urchins
Star fish)
Morphological characteristics
They have radial symmetry
They have a internal skeleton
A dermal skeleton
They do not have a differentiated head
Vital functions
Interaction
They have not complex sense organs
Reproduction
They have sexual reproduction
They are oviparous
They do the metamorphosis
Nutrition
They have a digestive system
They has a mouth , anus and glands.
Habitat
They live on the sea bed,
All animal are in this group aquatic and marines