Question

_____________ is an unique water filled system possessed by echinoderms.
A) Canal system
B) Ambulacral system
C) Haemal system
D) None of the above

Answer 1

Hint:The water system may be a mechanism for locomotion, food and waste transportation, and respiration, employed by sea stars and sea urchins. it's present during a phylum whose spiny skin owes its aiming to its name. These are merely aquatic species.

Complete answer:
A characteristic feature of the Echinodermata is that the water system. It consists of an array of channels of radiation, feet of tubes, and madreporite. Echinoderms have a selected water system, consisting of a central ring canal and radial canals running along each arm. Water flows through these systems, enabling gaseous exchange, nutrition, predation, and locomotion.
Now allow us to gather information about given options
A) Canal system : Porifera members also referred to as sponged have a water transport or canal system. Water enters through the minute pores of sponges called ostia within the body wall into a central cavity called spongocoel, from where it goes out through the osculum.
B) Ambulance system : It's also referred to as a water system or mechanism or auriferous system. It's a posh system which contains pipe-like structures called canals. It's a special feature seen in echinoderms.
C) Haemal system : Sea stars don't contain blood cardiovascular systems, instead they contain haemal system. This technique has the same functions as that of a blood transport system. It helps to move dissolved nutrients and gases.
D) None of the above : As an ambulacral system is that the water system of Echinodermata thus this feature can't be correct.

Thus the correct answer is option ‘B’ i.e, Ambulacral system.


Note:Water enters the system through the madreporite, flows through the stone canal, and enters the ring canal. sort of bulbous structures, referred to as Polian vesicles, that branch off of the ring canal function to stay up additional water stores. From the ring canal, water enters the radial canals that stretch into each of the arms, or rays. The lateral canals within the system branch from the radial canal and convey the water into the ampullae and podia of the tube feet in echinoderms.