Biology

Difference Between Striated Muscle and Non-Striated Muscle

Main difference

Muscles are one of the important components of our body. It is defined as a bundle or band of fibrous tissue in animals that has the ability to produce movement by contraction and relaxation. Its main function is to give strength to the body and to support it; they also produce movements. There are three main categories of muscles; Skeletal muscles Cardiac muscles and Smooth muscles. These muscles are made up of muscle fibers. Muscle fibers are of two types: striated muscle fibers and non-striated muscle fibers. Muscles that contain striated muscle fibers are called striated muscles and muscles that contain non-striated muscle fibers are called non-striated muscles.The difference between striated and non-striated muscles is that in striated muscles,

Comparative chart

Striated muscle Non-striated muscle
Voluntary or involuntary muscle Striated muscles are also called voluntary muscles, but some of the striated muscles are also involuntary like heart muscles. Non-striated muscles are completely involuntary.
Example Striated muscles are seen in skeletal and cardiac muscles. Non-striated muscles are seen in smooth muscles.
Sarcomere Striated muscles contain adequate sarcomere. Non-striated muscles do not have an adequate sarcomere.
Shape Striated muscles are long and cylindrical in shape. Non-striated muscles are not cylindrical.
Tendons Striated muscles are attached to the skeleton through tendons. Non-striated muscle has no tendons; they are present in internal organs.
Detail Striated muscles are multinucleated, have an adequate sarcoplasmic reticulum, and have a high mitochondrial concentration. Non-striated muscles are not nucleated, do not have an adequate sarcoplasmic reticulum, and have a lower concentration of mitochondria.
What is skeletal muscle?

Striated muscles are those muscles that have stripes; they are arranged parallel to each other in a defined way. All striated muscles are skeletal muscles and cardiac muscles. In striated muscles there are sarcomeres. Sarcomeres are the basic unit or contractile element of muscle. Sarcomere has a light and dark band; the light band is also called the I band and the dark band is also called the A band. Actin and myosin filaments are present in these bands, this forms a complete unit of the sarcomere. Striated muscles are attached to bone through tendons; These muscles are involved in voluntary movement because they are under the control of our will, which is why striated muscles are also called voluntary muscles. Striated muscles are long and cylindrical in shape; these fibers are multinucleated (multiple nuclei). It also has a prominent appearance and has a sarcoplasmic reticulum. It also contains many mitochondria and stores a large amount of glycogen in it. One of the common examples of skeletal muscle is the biceps.

What is non-striated muscle?

Non-striated muscles are those muscles that do not have stripes; they are arranged not parallel to each other indefinitely. All non-striated muscles are smooth muscles. In non-striated muscles, the proper sarcomere is not present due to its irregular shape under the microscope. It has its contractile element, but it is underdeveloped. In non-striated muscles, band A and band I are not clearly seen in it. In other words, a contractile element of striated muscles is underdeveloped. Striated muscles are present within the body in internal organs; These muscles are involved in involuntary movement because they are not under the control of our will, which is why non-striated muscles are called involuntary muscles. The non-striated muscles are long but not cylindrical in shape; these fibers are not nucleated (single core). It has a non-prominent appearance and has an underdeveloped sarcoplasmic reticulum. It contains less mitochondria compared to striated muscles and stores a small amount of glycogen in it. Non-striated muscles are seen primarily in the internal viscera (internal organs). The best example of non-striated muscle is the intestinal muscles.

Striated versus non-striated muscle
  • Striated muscles are also called voluntary muscles, but some of the striated muscles are also involuntary like heart muscles, while the non-striated muscles are completely involuntary.
  • Striated muscles are seen in skeletal muscles and heart muscle, while non-striated muscles are seen in smooth muscles.
  • Striated muscles contain the proper sarcomere, whereas non-striated muscles do not have the proper sarcomere.
  • Striated muscles are long and cylindrical in shape, while non-striated muscles are not cylindrical.
  • Striated muscles are attached to the skeleton through tendons, but non-striated muscle does not have tendons, they are present in internal organs.
  • Striated muscles are multinucleated, have an adequate sarcoplasmic reticulum, and have a high mitochondrial concentration, whereas non-striated muscles are non-nucleated, do not have an adequate sarcoplasmic reticulum, and have a lower concentration of mitochondria.

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