Respiration in mollusca?(answer should be in 5 points)
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Basically all molluscs breathe by gills that are called ctenidia (comb-gills) because of their comb-like shape. In terrestrial molluscs this respiration organ is reduced, but still respiration takes place in the pallial cavity. That is why it is also called the snail's respiratory cavity.
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Molluscs respire using Ctenidia. Arthrops have Antennae, Simple and Compound Eyes and Statocysts as Sensory Organs. Molluscs have Sensory Tentacles in the anterior head region instead of antennae and also have Osphradium in addition to the sensory structures of arthropods.
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