Arthropods

What are Arthropods?

Arthropods are a large phylum of invertebrates that includes insects, arachnids, crustaceans, and myriapods. Arthropods are characterized by their exoskeleton, segmented bodies, and jointed appendages, making them one of the most diverse and adaptable groups in the animal kingdom.

Animals with Hard Shells and Jointed Legs

Arthropods are a group of animals that have a hard outer shell, called an exoskeleton, and jointed legs. They make up the largest group of animals on Earth and include insects, spiders, crabs, and centipedes.

What Makes Arthropods Special?

• Exoskeleton: This tough outer shell protects their body like armor and helps them move.
• Jointed Legs: Their legs bend at joints, like our knees, making it easy to crawl, climb, or swim.
• Segmented Bodies: Their bodies are divided into parts, like a head, thorax, and abdomen.
• Molting: As they grow, they shed their old exoskeleton and form a new, larger one.

Types of Arthropods

1. Insects: Ants, butterflies, and beetles. They usually have six legs, wings, and antennae.
2. Arachnids: Spiders, scorpions, and ticks. They have eight legs and no antennae.
3. Crustaceans: Crabs, lobsters, and shrimp. They mostly live in water and have claws.
4. Myriapods: Centipedes and millipedes. These arthropods have many legs.

Where Arthropods Live

Arthropods live almost everywhere:

• Land: Ants and spiders are found in forests, deserts, and even your backyard.
• Water: Crabs and shrimp thrive in oceans and rivers.
• Air: Butterflies and bees fly and pollinate plants.