Understanding the Skeleton, Bones, Joints and Muscles Crossword

The fluid that spreads out over the surfaces of the cartilage in a joint
The backbone that protects the spinal cord
A bundle of soft and fibrous tissue which makes up 40-45% of your body mass
Muscles which are found between your ribs which help facilitate breathing
The muscle which contracts when you bring your forearm up
The joint which allows for a lot of movement. It forms a round structure
Tough fibres which hold bones together and prevent them from moving apart
Several bones fused together to form a strong case around the brain
The system in your body made from bones and muscles
A hinge joint between your upper and lower leg