AP BIOLOGY

Detailed explanation-1: -Phylum Echinodermata belongs to kingdom Animalia, they are triploblastic animals. Examples of echinoderms include sea star, sea urchins etc. Echinoderms are marine animals, they are unisexual and their body have a tough spiny exoskeleton.

Detailed explanation-2: -Echinoderms are named for the spines or bumps covering the outer surface of the bodies of many of them (Greek root word echino-meaning spiny; Latin root word-derm meaning skin). Examples of echinoderms include sea stars, sea urchins, sea cucumbers, brittle stars, and feather stars (Fig. 3.83).

Detailed explanation-3: -The water vascular system is found in the phylum Echinodermata. The water vascular system is a hydraulic system that is used for locomotion, respiration, and food and waste transportation. It has canals which are connected to numerous tube feet to push the organisms against the ground.

Detailed explanation-4: -All echinoderms have a water-vascular system, a set of water-filled canals branching from a ring canal that encircles the gut. The canals lead to podia, or tube feet, which are sucker-like appendages that the echinoderm can use to move, grip the substrate, or manipulate objects.

Detailed explanation-5: -Spiny skinned organisms that have a water vascular system belong to the phylum: Echinodermata. Teeth-like structures found in the mouths of sea urchins that are used for rasping algae are called: Aristotle’s lantern.