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Chapter: BIOLOGY (ZOOLOGY) Standard XI first year 11th text book Assignment topics question and answer Explanation Definition

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Human Muscular System and Types of Muscular System

Locomotion and bodily movements are characteristic features of the animals. The movements are effected by various cell organelles such as cilia, flagella and organs like muscles. Muscular movements are more powerful and energetic.

Human Muscular System and Types of Muscular System

 

Locomotion and bodily movements are characteristic features of the animals. The movements are effected by various cell organelles such as cilia, flagella and organs like muscles. Muscular movements are more powerful and energetic. The skeletal muscles apart from their role in smarter movements, provide beautiful shapes to the body. The inner smooth muscles of the visceral organs make them work like machines all through the life period. The muscle cells function like small motors to produce the forces responsible for the move-ment of the arms, legs, heart and other part of the body. Thus the highly spe-cialized muscle tissues are responsible for the mechanical processes in the body.

 

Based on structure, functioning and occurrence three different types of muscle tissues have been identified. They are the skeletalvisceral andcardiac muscles.

 

1). Skeletal muscles or striped muscles : These muscles are attached to the bones. The muscle cells are long and cylindrical. These voluntary muscles cause body movements.

 

2). Visceral muscles or Nonstriated muscles: These are found in the walls of the inner organs such as blood vessels, stomach and intestine. The muscle cells are spindle shaped. These are involuntary in nature.

 

3). Cardiac muscle : These are found in the wall of the heart. The muscle cells are cylindrical and branched. The muscles are involuntary in nature.



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