The muscular system
- makes up about 45% of body mass
Muscles and movements :
- skeleton provides attachment for muscles
- Muscles contract against the skeleton to create movement
- Originally long and thin
- When contracted they are sort and thick
Skeletal muscle :
- Made up of protein and cylindrical fibers
- Composition is long and thin
- Attached to the skeleton
- Pull on bones to create movement
Cardiac muscle :
- found in wall of the heart
- Will never tire as long as it has a good blood supply
- makes up about 45% of body mass
Muscles and movements :
- skeleton provides attachment for muscles
- Muscles contract against the skeleton to create movement
- Originally long and thin
- When contracted they are sort and thick
Skeletal muscle :
- Made up of protein and cylindrical fibers
- Composition is long and thin
- Attached to the skeleton
- Pull on bones to create movement
Cardiac muscle :
- found in wall of the heart
- Will never tire as long as it has a good blood supply
