Question

Is offence and defence organ in echinoderms. *
1 point
a) madreporite
b)pedicellariae
c)Pollen vesicle
d) tube feet
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Answer 1

Answer:

Is offence and defence organ in echinoderms. *

1 point

a) madreporite

b)pedicellariae

c)Pollen vesicle

d) tube feet

Answer 2

Answer:

The pedicellariae is the offence and defense organ in echinoderms.

Explanation:

• Pedicellariae is a claw-like structure on a small scale. In Echinoderms, the organ's job is to keep the organism's surface free of detritus and minute parasites.
• Echinoderms employ the madreporite, a light-colored calcareous aperture, to filter water into their water circulatory system. It works in the same way as a pressure-equalizing valve.
• Polian vesicles are bulbous cavities in the ring vessel of ophiuroids, asteroids, concentricycloids, and holothurians that appear to maintain pressure in the system and store backup fluid supplies.
• The many tiny tubular projections present on the oral face of echinoderm arms are known as tube feet. They are part of the echinoderm phylum's water circulatory system. They are echinoderm locomotory organs that aid in locomotion, respiration, and eating.