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5. A claw or pincer used by crustaceans like crabs and lobsters to catch food or defend themselves.
7. A big group of animals with hard shells, many parts, and jointed legs—like insects, spiders, and crabs.
10. A water larva of some insects like mayflies and stoneflies.
12. A group of animals that includes crabs, shrimp, and lobsters, which have hard shells and two antennae.
13. Shedding the outer shell so the animal can grow bigger.
15. An immature insect that looks different from the adult and grows into the adult later.
17. The process of changing from a larva or nymph into a grown-up insect or animal.

1. A hard outer shell that protects and supports invertebrates like insects and crustaceans.
2. A body part where the head and the front part of the body are combined into one piece.
3. An immature insect that looks like a small version of the adult but isn’t fully developed.
4. A stage in an insect’s life between molts, when it grows.
6. A tough material that makes up the shells of insects, spiders, and crustaceans.
8. A body part like an arm, leg, or antenna attached to an animal.
9. where males and females are separate and have different bodies.
11. The group of animals called millipedes, which have many legs and body parts.
12. A group of animals like spiders and scorpions that have mouthparts called chelicerae (pincer-like parts).
14. A simple eye that detects light but not detailed images.
16. gland An organ in crustaceans that gets rid of waste and controls water balance.