GENERAL HISTOLOGY

Detailed explanation-1: -Evisceration is a method of autotomy involving the ejection of internal organs used by animals as a defensive strategy. 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: -Defensive Adaptations 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: -To protect themselves against predators and pathogens alike, sea cucumbers produce defensive toxins called saponins, as do their close cousins, starfish.

Detailed explanation-4: -They Breathe Through Their Butt All species of sea cucumber breathe by dilating their anal sphincter to suck water into their rectum, where specialized structures called respiratory trees-butt lungs-extract oxygen molecules from the water.

Detailed explanation-5: -When attacked, the cucumber spews out sticky threads from its anus, tangling the hunter. Others can expel their entire guts out their anus. This may confuse, repel or feed predators. As extreme as this defense sounds, a cucumber can quickly regenerate its inner organs.