Exploring the Animal Kingdom: Invertebrates and Their Diversity
Delve into the fascinating world of invertebrates in the animal kingdom. Learn how scientists classify them based on characteristics like symmetry and the presence of a backbone. Discover a range of invertebrates from sponges to echinoderms and understand their unique features and adaptations.
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Presentation Transcript
Animals Without Backbones Chapter 2: The Animal Kingdom
Scientists keep track of Earths animal species by observing their similarities and differences.
An animal with symmetry has body parts that match other body parts around a midpoint or line.
Animals can be classified by whether or not they have a backbone.
Invertebrates that have stinging cells on their tentacles are called cnidarians.
Clams, squid, and snails are soft-bodied invertebrates with hard shells and are called mollusks.
Sea stars, sea urchins, and sand dollars are spiny- skinned invertebrates, called echinoderms.
All echinoderms have a support structure inside their bodies, called a(n) endoskeleton.
Invertebrates with jointed legs and body sections are called arthropods.
Arthropods have a hard outer covering, called a(n) exoskeleton, that protects their bodies and holds in moisture.
Worms are classified as flatworms, roundworms, or segmented worms.
Flatworms have ribbon-like bodies, and some types live inside the bodies of other animals.
Exit Question In the margin of your paper, answer the following questions: If you were an animal, what would you be and why? Would your animal be considered a vertebrate or invertebrate?
