Echinoderm | MCQs

Explanation

• Water vascular system in echinoderms used for Respiration
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• The Water Vascular system in echinoderms is also used for locomotion, food, and waste transportation.
• The water vascular system helps in respiration, as the gaseous exchange takes place on the thin wall of feet tubes.
• The system consists of a central ring canal and radial canals extending along each arm
  

Explanation

Echinoderms (such as starfish, sea urchins, and sea cucumbers) are invertebrates because they lack a backbone.

They have a unique water vascular system and radial symmetry.

Explanation

Explanation

Explanation

Tube feet, respiratory tree, and papillae are all present in Holothuroidea, which are commonly known as sea cucumbers.

Holothuroidea is a class of echinoderms that includes various species of sea cucumbers.

Explanation

Sea cucumbers belong to the class Holothuroidea within the phylum Echinodermata.

Unlike some other echinoderms like starfish (class Asteroidea), sea cucumbers do not have arms that are sharply set off from a central disc

Explanation

The invertebrate that has a water vascular system is an echinoderm

Specifically starfish, sea urchins, sea cucumbers, brittle stars, and feather stars.

This unique system is a defining characteristic of the phylum Echinodermata. 

Explanation

Explanation