A muscle is a group of muscle tissues which contract together to produce a force. A muscle consists of fibers of muscle cells surrounded by protective tissue, bundled together many more fibers, all surrounded in a thick protective tissue.
Muscles are primarily responsible for:
Skeletal muscle is a muscle tissue that is attached to the bones and is involved in the functioning of different parts of the body. These muscles are also called voluntary muscles as they come under the control of the central nervous system in the body.
Example:
The sphincter muscles present
The primary function of the cardiac muscle is to regulate the functioning of the heart by the relaxation and contraction of the heart muscles. Other functions of cardiac muscles include:
The smooth muscles of the human muscular system are spindle-shaped muscle fibres with a single nucleus. The thickness of the smooth muscles ranges between 3-10 µm and its length ranges between 20 to 200 μm, which are shorter compared to the skeletal muscle. These muscles lack filaments, special protein, actin and myosin and produce their own connective tissue.
Like all other types of muscles, smooth muscles are also involved in contraction and relaxation. Other functions of smooth muscles include:
The human muscular system is composed of the muscles and the tendons that connect them to the skeleton. All muscle types are capable of receiving and responding to stimulation from nerves and are capable of contracting. Each type of muscle also has its own special role that it performs within our bodies
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1. What are the main functions of muscles in the human body? |
2. How do skeletal muscles differ from cardiac and smooth muscles? |
3. What is the role of cardiac muscle in the circulatory system? |
4. What are the characteristics of smooth muscle? |
5. How can regular exercise affect skeletal muscles? |
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