This chapter describes the structure and function of the three different kinds of muscle; smooth, cardiac and skeletal muscle.
After completing this section, you should know:
- the structure of smooth, cardiac and skeletal muscle and where they are found
- what the insertion and origin of a muscle is
- what flexion and extension of a muscle means
- that muscles usually operate as antagonistic pairs
- what tendons attach muscles to bones
- There are three different kinds of muscle tissue: smooth muscle in the walls of the gut and blood
vessels; cardiac muscle in the heart and skeletal muscle attached to the skeleton.
- Tendons attach skeletal muscles to the skeleton.
- Ligaments link bones together at a joint.
- Skeletal muscles work in pairs known as antagonistic pairs. As one contracts the other in the pair relaxes.
- Flexion is the movement that reduces the angle of a joint. Extension increases the angle of a joint.