GENERAL HISTOLOGY

Detailed explanation-1: -Sea cucumbers are echinoderms from the class Holothuroidea (/ˌhɒləˌjʊəˈrɔɪdi.ə, ˌhoʊ-/). They are marine animals with a leathery skin and an elongated body containing a single, branched gonad. Sea cucumbers are found on the sea floor worldwide.

Detailed explanation-2: -Found only in salt water, more than a thousand species of sea cucumbers exist around the world. These squishy invertebrates are echinoderms, making them distant relatives to starfish and urchins. Unlike starfish or sea urchins, the bodies of sea cucumbers are covered with soft, leathery skin instead of hard spines.

Detailed explanation-3: -Class Holothuroidea. The class Holothruoidea is better known by as the sea cucumbers. Sea cucumbers are cylindrical echinoderm animals with feathery tentacles at the mouth end of their bodies.

Detailed explanation-4: -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.

Detailed explanation-5: -While many echinoderms do begin life as a bilateral larva, later they become radial with five-part symmetry and no central brain. The bodies of echinoderms are made of hard calcium-based plates that are often spiny and always covered by a thin skin.