OESOPHAGUS STOMACH
ECHINODERMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False
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Either A or B
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None of the above
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Detailed explanation-1: -The hard, spiny skin of an echinoderm is called an exoskeleton.
Detailed explanation-2: -Echinoderms have an exoskeleton made up of spicules. These spicules are spiny structures that are made up of Calcium carbonate minerals. They are very hard and provide a tough and protective skeleton for the body.
Detailed explanation-3: -The skeleton structure of echinoderms is classified as an endoskeleton because the small plates are located beneath the skin of these animals.
Detailed explanation-4: -Structure and Function of Echinoderms. Echinoderms are named for their “spiny skin.” However, the spines aren’t on their skin. They are part of the endoskeleton. The endoskeleton consists of calcium carbonate plates and spines, covered by a thin layer of skin.