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Gurmeet Singh posted an Question
August 19, 2020 • 21:17 pm 30 points
  • IIT JAM
  • Geology (GG)

Sir, what controls the opening and closing of valves , means adductor muscles on contracting wt happens and on closing wt happens.

Adductors reiaxed- Dorsal vave Adductors contracted Hinge axss- Hinge aKIS Diductots Diductors relaxed contracted Venttal valve Fig. Brachiopod valves are opened and closed by pairs of opposed muscles: (A) Contraction of adductors closes the valvess Relation to substrate

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    Rahul kumar Best Answer

    By contracting and relaxing different muscles present inside the body of brachiopod, they can open or close the valves whenever needed. Adductor muscles help in closing the valves, Deductor muscles help in opening the valves and Adjustor muscles help in adjusting the position of valves on substrate. More specifically, the two valves of the shells of Brachiopods are opened and closed by muscles. In the articulata, there is a simple arrangement: two sets of paired muscles. The adductor muscles, which close the halves of the shell, are the largest. The diductor muscles, which have their point of attachment close to the hinge in the dorsal valve, open the shell so that the animal can feed. There is also a pair of adjustor muscles, which attache to the Ventral valve and the pedicel.

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    Sajan sarthak best-answer

    opening is done by deductor where as closing is done by adductor muscle. opening of valves helps them in eating , movement,and protection from enemy

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