Which of the following is the balancing organs in arthropods?

Correct option is D

The correct answer is (D) Statocyst



Explanation:
• The statocyst is a balance sensory receptor present in some aquatic invertebrates, including arthropods like crustaceans.
• It helps the organism maintain its orientation and equilibrium in relation to gravity.

Information Booster:
• Statocysts typically consist of a sac-like structure containing a mineralised mass (statolith) and numerous innervated sensory hairs.
• They are commonly found in the antennules of crustaceans like crayfish and lobsters.

Additional Knowledge:
• Operculum (Option A): A protective covering, such as the gill cover in bony fishes.
• Proboscis (Option B): An elongated feeding tube or snout found in insects and other animals.
• Nephridium (Option C): An excretory organ found in many invertebrates like earthworms.