Question

21.Muscles whose contraction is not under our control are

Answer 1

Smooth Muscle contraction not a under our control.

Smooth muscles generally present in the walls of visceral organs e.g alimentary canal,blood vessels,urinary bladder ureters etc. The muscle are not the under will hence it also called involuntary muscle.

The smooth muscle not attached to skeletal structures hence it not in under our control.

E.g single unit smooth muscle,multi unit smooth muscles.

cardiac muscle

Cardiac muscle show similarities with smooth muscle .cardiac muscle resemble smooth muscle in being uninucleate in being involuntary .

Cardiac muscle present position is myocardium of heart.