In human bodies muscle tissue is met with almost everywhere. One distinguishes thereby three types of muscle tissue:
- Skeletal musculature
- Cardiac musculature
- Smooth musculature
With very few exceptions muscle tissue stems from mesoderm that represents the middle germinal layer in early embryonic development. With the development of the skeletal muscle four successive cell types appear: premyoblasts, myoblasts, myotubes and finally the muscle fibers themselves. With 9-10 weeks the anlagen of almost all the muscle groups have formed and can be compared with how they appear in adults.
In this development there are also disorders that affect the spreading, the form or - far more fundamentally - the metabolism of the musculature.