OESOPHAGUS STOMACH
ECHINODERMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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tracheal tubes
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ovarian tubes
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cuvierian tubules
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malpighian tubules
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Detailed explanation-1: -Sea cucumbers (Holothuroidea) eject parts of the gut in order to scare and defend against potential predators such as crabs and fish. The organs are regenerated in a few days by cells in the interior of the sea cucumber.
Detailed explanation-2: -Holothuroidea (sea cucumbers) are one of five extant classes that make up the phylum Echinodermata.
Detailed explanation-3: -Their bodies have tiny bumps called tube feet, which can move back and forth. Some species (types) use their tube feet to pull themselves along the seabed, while others wave them around in the water to pick up particles of food.
Detailed explanation-4: -When these sea cucumbers are disturbed, such as when they are attacked by a predator, they release a sticky, white, thread-like secretion from their anus called Cuvierian tubules. This is used as a defense mechanism against threats. They are the only poisonous species of sea cucumber.