GENERAL HISTOLOGY

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.

Detailed explanation-2: -When threatened, some sea cucumbers discharge sticky threads to ensnare their enemies. Others can mutilate their own bodies as a defense mechanism. They violently contract their muscles and jettison some of their internal organs out of their anus.

Detailed explanation-3: -Echinoderms use their regenerative abilities as a defensive mechanism, frequently utilized by starfish when caught by an arm. When this happens, these animals will just drop off an arm and move away. The unwary attacker is left with a wiggling arm while the rest of the animal moves away to regenerate a new arm.

Detailed explanation-4: -The skeleton and spines that are so prominent in other echinoderms are reduced in sea cucumbers. Instead of a rigid skeleton, sea cucumbers have a muscular body well that contains only microscopic skeletal ossicles. The muscular body wall provides support, and so does the water inside the cucumber’s large body cavity.

Detailed explanation-5: -Sea cucumbers are part of a larger animal group called echinoderms, which also contains starfish and sea urchins. Their body shape is similar to a cucumber, but they have small tentacle-like tube feet that are used for locomotion and feeding.