So there are three different types of muscles, which also have different structures. Thus
- the smooth musculature and the myocardium each have only one cell nucleus, while the striated skeletal musculature has many cell nuclei.
- the smooth musculature and the myocardium have only a moderately developed sarkoplasmatic reticulum, while this is very pronounced in the skeletal muscle
- the smooth musculature and the myocardium have no neuromuscular junction , while the skeletal musculature is innervated with it.