Siphons and gills are structures in aquatic organisms used for
Answer Details
Siphons and gills are structures in aquatic organisms used for gaseous exchange. Siphons are tube-like structures found in bivalve mollusks, while gills are feathery structures found in fish and some mollusks. Both structures are used to extract oxygen from water and release carbon dioxide, which is necessary for respiration. Siphons and gills are highly adapted for aquatic life, as the concentration of oxygen in water is lower than in air, and they enable organisms to extract enough oxygen to sustain life.