Invertebrate Zoology Practical Notes | Invertebrate Practical Specimens

Invertebrate Zoology Specimen
-Invertebrates are those animals having without a vertebral column or spine. They constitute a vast majority of the animal kingdom and exhibit diverse forms and functions. Here are key points:
•Diversity: Invertebrates make up about 95% of all animal species, ranging from simple organisms like sponges to complex ones like insects and mollusks.
•Body Structure: Lack a backbone; instead, they may have exoskeletons (e.g., arthropods) or soft bodies (e.g., worms).
•Reproduction: Various reproductive strategies, including sexual and asexual reproduction. Some undergo metamorphosis (e.g., butterflies).
•Ecological Roles: Invertebrates play crucial roles in ecosystems as pollinators, decomposers, and as a food source for other organisms.
•Adaptations: Many have evolved specialized adaptations for survival, such as mimicry, camouflage, and venomous defenses.
•Economic Importance: Some invertebrates, like bees, are vital for pollination, while others, like silkworms, are economically important for products like silk.
Major Groups:
1.Arthropods: Largest phylum, includes insects, spiders, crustaceans.
2.Mollusca: Includes snails, clams, squids; often have a soft body protected by a shell.
3.Annelids: Segmented worms like earthworms and leeches.
4.Cnidarians: Jellyfish, corals; have specialized cells called cnidocytes for capturing prey.
Different Phylums names:
Porifera
Platyhelminthes
Aschelminthes
Annelida
Mollusca
Cnidaria
Arthropoda
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