#echinodermata #echinoderms
Adult echinoderms exhibit pentaradial symmetry and have a calcareous endoskeleton made of ossicles, although the early larval stages of all echinoderms have bilateral symmetry. The endoskeleton is developed by epidermal cells and may possess pigment cells, giving vivid colors to these animals, as well as cells laden with toxins. Gonads are present in each arm. In echinoderms like sea stars, every arm bears two rows of tube feet on the oral side. These tube feet help in attachment to the substratum. These animals possess a true coelom that is modified into a unique circulatory system called a water vascular system. An interesting feature of these animals is their power to regenerate, even when over 75 percent of their body mass is lost.Echinoderms are unisexual animals. Sexual dimorphism is absent. Fertilisation takes place in water. The development may be direct or indirect. If the development is indirect it includes larva stages. In different classes of echinoderms, different types of larvae complete the development. The larval form is bilaterally symmetrical. It undergoes metamorphosis and radial symmetrical adult is developed.
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Metamorphosis :-
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Harmonal regulations in metamorphosis :-
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Echinodermata
Echinoderms
Types of echinodermata larva
Types of larva in echinoderms
Alampally phanindra
Phanindra gupta
Metamorphosis
Types of larva
Zoology
larval forms of echinodermata
bipinnaria larva
larvae of echinoderms
doliolaria larva
phylum echinodermata
echinodermata larval forms
echinodermata classification
echinodermata general characters and classification
