About Animals 2

Why do animals have skeletons inside their bodies?
Answer:
Not all animals have skeletons, but most large ones do. This is because the bigger an animals is, the more it needs a strong sturdy framework to hold its body together and carry its weight. Skeletons also protect soft inside parts, like brains and heart.
*Most animals' skeletons are made of bone, but a shark's skeleton is made of gristle. This isn't as hard as bone, but it's still tough. You are some at your nose tip.
*Animals without backbones are called invertebrates. Insects, spiders, snails, worms, jellyfish, prawns and crabs are all invertebrates.
*Animals with backbones are calls vertebrates, and so are amphibians, reptiles, birds and mammals.

Which animals have skeletons on the outside?
Answer:
Most smaller animals have tough skins called exoskeletons. These outside skeletons do the same job as insede ones. They protect and support the animals' soft bodies.
*Insects, spiders, scorpions, centipedes and milipedes all have tough exoskeletons. Lobsters, crabs and some beetles have really tough exoskeletons that work like armour, to protect them from attack.