There are more than 600 muscles in the human body. Two of the main types are cardiac and smooth muscles, involuntary muscles which you can't control at will.
- There are three different types of muscle within the human body.
- Cardiac muscle is found only in the heart and is the hardest working.
- Smooth muscle is found in hollow organs, such as the stomach and intestines, and is essential for all bodily processes.
- Skeletal muscles are voluntary muscles – nearly all bodily movement is caused by their contractions.