The triad of the striated myofibril consists of:
a/
b/

What is the embryonic origin of:
a/ smooth muscle tissue-
b/ skeletal striated muscle tissue-
c/ cardiac striated muscle tissue-
d/ myoepithelial cells-

The following proteins are present in the striated myofibrils:
a/
b/
c/
d/

The following types of the muscle tissue are innervated by the vegetative nervous system:
a/
b/

For smooth muscle tissue the type of microscopic organization is specific and the nuclei are localized in the part of the cells.

The main contractile unit of the striated myofibrils is which is localized between lines.