Which invertebrates have exoskeletons

Slugs, leeches, and jellyfish have soft bodies and no exoskeleton. The pressure of fluids inside their bodies maintains their shape. Like most invertebrates, sea urchins have relatively complex internal organs. Food is broken down using five teeth contained in a central structure known as Aristotle? The hard exoskeletons of insects and creatures such as crabs do not grow with the rest of the body.

As the animal grows, its exoskeleton gets too tight? It also shows how Large, established The scientists have been investigating the use of gold Going for Gold to Reduce Antibiotic Resistance. Print Email Share. Most Popular Stories. It's in the Father's Genes.

Living Well. Show the first image of the clip and invite the pupils to choose one of the animals and write a diary for them, describing how they might feel when they grow such as when the skin is getting too tight for them or how safe they might feel when being attacked by other animals. Description Classroom Ideas.

Description up. This clip is from : Science Clips , Moving and Growing.