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phylum mollusca class 11 general characteristics of phylum mollusca molluscs
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Phylum Mollusca is a diverse group of invertebrate animals, including squids, octopuses, clams, mussels, oysters, snails, slugs, and many others. Here are the general characteristics of Phylum Mollusca in detail: • 1. Body Structure: • Soft, unsegmented body • Bilateral symmetry • Typically divided into head, foot, and visceral mass • 2. Shell: • Most mollusks have a shell, but some (like squids and octopuses) have a reduced or internal shell • Shell is made of calcium carbonate and protein • Provides protection and support • 3. Mantle: • A layer of tissue that covers the body and shell • Helps to secrete the shell • Contains muscles that help to move the shell • 4. Foot: • A flat, muscular organ used for locomotion and feeding • May be modified for specific functions (e.g., snails' foot is used for crawling) • 5. Radula: • A tongue-like structure with tiny teeth • Used for feeding and scraping food particles • 6. Digestive System: • Complete digestive system with mouth, esophagus, stomach, and intestine • Some mollusks have a specialized digestive system (e.g., squids have a beak-like structure) • 7. Respiration: • Most mollusks have gills or branchiae for respiration • Some (like snails and slugs) have a lung-like structure • 8. Circulatory System: • Open circulatory system (except for cephalopods, which have a closed system) • Heart pumps blood to the gills or body tissues • 9. Nervous System: • Decentralized nervous system (except for cephalopods, which have a centralized system) • Includes a pair of ganglia (nerve clusters) and nerve cords • 10. Sensory Organs: • Eyes (simple or complex) • Statocysts (balance organs) • Tentacles (sensory appendages) • These characteristics are shared by most mollusks, but there may be variations depending on the specific class or species. • Your Queries:- • phylum mollusca • mollusca • phylum mollusca class 11 • phylum mollusca characteristics • characteristics of phylum mollusca • general characteristics of phylum mollusca • phylum mollusca in hindi • ncert बूटी phylum mollusca • phylum mollusca class 11 biology • molluscs • general characteristics of phylum mollusca class 11 biology • mollusca class 11 • mollusk • mollusca phylum • phylum mollusca mcq • phylum mollusca mcat • mcat phylum mollusca • phylum mollusca neet • #mollusks #biology #general #diversityandinclusion #snail #octupus
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