Mollusca
Mollusca is a diverse phylum of invertebrate animals that includes snails, slugs, octopuses, squids, and more. They are known for their soft bodies and hard shells in many species.
Characteristics of Mollusca
- Soft-bodied animals
- Most have a hard shell
- Bilateral symmetry
- Three main body parts: head, visceral mass, and foot
- Most have a radula, a feeding structure with tiny teeth
Classes of Mollusca
Mollusca is divided into several classes, including:
- Gastropoda - includes snails and slugs
- Bivalvia - includes clams, oysters, and mussels
- Cephalopoda - includes octopuses, squids, and cuttlefish
- Polyplacophora - includes chitons
- Scaphopoda - includes tusk shells
Importance of Mollusca
Mollusks play important roles in various ecosystems and have economic value as well. They are a food source for many animals and humans, and some species are used in the production of pearls and jewelry.
Study Tips
When studying Mollusca, be sure to focus on the different classes and their unique characteristics. Pay attention to the adaptations of each class and their ecological roles. Additionally, understanding the anatomy and feeding mechanisms of mollusks can be beneficial for a comprehensive understanding of the phylum.
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