Muscular System

Muscular system is an organ structure that assists in the motion of a human frame. A human muscular system comprises of numerous fibres that ensure posture maintenance and blood circulation.

Approximately, there are around 700 muscles in a body that accounts for half of a person’s weight. Each of them is a distinct organ is made up of blood vessels, tendons, skeletal tissues, etc. These tissues are also found inside various organs such as stomach, blood vessels, etc.

Therefore, muscular system organs are accountable for the movement of the skeleton structure. Its contraction enables proper blood flow in human beings. However, there are various sorts of muscles resulting in the functioning of a physique.

Types of Muscular System

The human muscular system consists of various tissues that help in maintaining a stable bodily posture. These include –

  1. Visceral: The muscles are available in organs such as intestines, stomach and blood vessels. Since these smooth muscles get controlled by the nervous system of a body, they are involuntary. The primary function of these tissues is to contract to make things move through an organ.


  1. Cardiac: These tissues are found only in the heart of a human being, and they pump blood throughout the body. They are not in control of the conscious state of mind, and these cells of cardiac tissues are striated. When the brain signals these muscles, they tend to contract, resulting in a movement of the heart. Unlike smooth muscles, cardiac tissues are firm, and they appear to comprise of light  and dark stripes when one places them under a light microscope. The colour of bands results due to the positioning of protein fibres within the cells. These cells are in a branched format of X or Y- shape connected firmly at specific joints known as intercalated disks. These disks comprise of projections similar to a finger that ensures to maintain intense bondage between these cells. Both the branched format and disks help cells to prevent high blood pressure throughout life.


  1. Skeletal Muscle: These muscular system parts are only voluntary tissues in the entire human frame. For every action that a person performs requires the functioning of these muscles, such as eating, dancing, jumping, etc. Their contraction allows movement in all parts of a body.


They move to create a pull in the tendons, shortening the tissue length, and nearing bones close to each other. Most of them attach with the bones via durable bands of connective tissue known as tendons.

Functions of the Muscular System

The human muscular system helps to perform various types of activities and allows several daily functioning. Some of these are listed below –

  1. Maintain Posture: Another vital activity of the muscles is to keep the human frame in the correct position. They help a person to balance their physique and accurately perform all movements.

  2. Movement: The primary muscular system function is the motion of body parts. When they contract, it results in various activities such as walking, eating, running, etc. Tiny skeletal muscles are accountable for the finest movements, such as writing, speaking, etc.

  3. Blood Circulation: The muscles present in the heart ensure proper flow of blood to various portions of a body.

  4. Respiration: For breathing purpose, there is a necessity of the diaphragm muscle. It relaxes pushing air from the lungs.

  5. Digestion: Smooth muscles present in the stomach and intestines ensure proper digestion in a person.

  6. Regulation of Temperature: The muscular system is also accountable for maintaining stable body temperature.

Test Your Knowledge

  1. Intercostal muscles are present in _______

  1. Legs

  2. Stomach

  3. Heart

  4. Ribs

To learn more such muscular system information, study the course materials available in our website today. You can also download and install the Vedantu’s mobile app to join live online classes.


FAQ (Frequently Asked Questions)

1. How the muscular system works together?

According to the muscular system definition, these muscles connect with the skeleton and their contraction results in its movement.

2. What does the muscular system consists?

A human body muscular system comprises of various types of muscles. It is an organ structure comprising of skeletal, heart or cardiac and smooth or non-striated muscles that ensure the mobility of a frame.

3. What is the importance of the muscular system?

The muscular system structure comprises of specific cells known as muscle fibres. Since the primary function of these fibres is contraction; they enable motion of the body parts. Additionally, they help to maintain a body posture, stability of joints, and heat production.