Parts of Nervous System. Nervous System: Nervous system is the chief controlling and coordinating system of the body. It controls and regulates all activities of the body, whether voluntary or involuntary, and adjusts the individual (organism) to the given surroundings.
1.Skeletal muscles are attached to the bones. Smooth muscles line up the visceral organs viz. Intestines,blood vessels,pupils etc (therefore also known as visceral muscles.) 2.Skeletal muscles perform voluntary actions. Smooth muscles are responsible for involuntary reflexes and actions.
Types of smooth muscles-. Single unit(most of the smooth muscles are of this type) Multi-unit eg-Ciliary muscles. 8.Both types of muscles contain actin and myosin filaments,but in Skeletal muscles,Actin:Mysoin=2:1,while for smooth muscles,Actin:Mysoin=10:1. Actin and Myosin are muscle filaments which contract or relax,causing the whole muscle to perform the desired action.