Question

A perforated plate permits the entry of water into the ambulacral systen ub echinoderms
1) Tube feet
2) Pedicellariae
3) Madreporite
4) Dermal branchiae​

Answer 1

Answer:

The answer to the question is tube feet

Answer 2

A perforated plate permits the entry of water into the ambulacral system in echinoderms is 3) Madreporite.

Phylum Echinodermata:

• Any member of the phylum Echinodermata is an echinoderm.
• The adult sea lilies, also known as "stone lilies," starfish, brittle stars, sea urchins, sand dollars, and sea cucumbers are distinguishable by their (often five-point) radial symmetry.
• Echinoderms all share two main traits that distinguish them from all other organisms, despite the fact that they may seem very different from one another: a water circulatory system and five-sided radial symmetry.
• An echinoderm's body is covered in an intricate network of canals known as the water vascular system.

About Water vascular system:

• A central ring canal and radial canals that run along each arm make up the distinctive ambulacral or water vascular system that is found in echinoderms.
• These structures' water circulation promotes gaseous exchange, as well as nourishment, predation, and movement.
• The aqueous vascular system also extends as tube feet from perforations in the skeleton.
• Depending on the amount of water in the arm's system, these tube feet may expand or compress.
• The animal's tube feet can either protrude or retract by applying hydrostatic pressure.
• On the echinoderm's aboral side, water enters the madreporite.
• The water then enters the stone canal, which transports water into the ring canal, from there.
• A pentaradial animal has five radial canals, and these canals transport water into the ampullae, which contain tube feet through which the water travels.
• The radial canals are connected by the ring canal.

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