The muscle is a specialised tissue which is originated from

Smooth muscles are not:

Describe the structure of cardiac muscle tissue.

Smooth muscle tissue is ...

The given characteristics are observed in .......
$-$ They are located in the inner wall of the alimentary canal.
$-$ They do not show any striations.
$-$ They are non-striated and spindle-shaped.
$-$ They are involuntary and innervated by the autonomic nervous system.

Which germ layer forms the skeletal muscles in vertebrates?