Draw a labelled diagram of unstriated (smooth) muscle tissue and mention its occurrence,features,and functions.

(N/A) Occurrence: These tissues are found in the walls of the alimentary canal,urinary bladder,oesophagus,and blood vessels.
Features:
$(i)$ They do not have any striations (bands).
$(ii)$ Cells are long,thin,and spindle-shaped.
$(iii)$ Each cell has a single,central nucleus.
Function:
$(i)$ These muscles are involuntary,meaning they do not work according to our will.
$(ii)$ They produce rhythmic movements in the alimentary canal,urinary bladder,and gall bladder to facilitate the transport of substances.