UNIT OVERVIEW

Animals need support systems to keep their shape, move around, and protect their insides. A jellyfish uses fluid inside its body. A crab has a hard shell on the outside. You have bones inside your body. These are three different ways animals solve the same problem.

In this unit, you will learn about:

• The three main types of skeletons: hydrostatic, exoskeleton, and endoskeleton
• The human skeleton and how it is organised
• How bones, cartilage, tendons, ligaments, and muscles work together
• Common injuries and how to prevent them