What are the different types of muscles?

The human body has more than 600 muscles. 

Muscles have different movement functions; they carry out these movements by contracting and relaxing. Some muscles work by pumping blood around the body, breaking down food in the stomach, giving birth, lifting things, and many other functions. 

The food we consume helps to fuel these muscles. Glucose from carbohydrates is the component for muscle movement, alongside other minerals and dietary substances. Muscles are made up of thousands of small elastic fibres wrapped in a transparent membrane. This membrane is called the perimysium. 

There are three types of muscles in the human body:

  • Cardiac muscle
  • Smooth muscle
  • Skeletal muscle

The movement of these muscles can either be voluntary or involuntary. Voluntary means the movement is made with conscious awareness. Involuntary means the movement is made without conscious awareness. 

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What are cardiac muscles?

Cardiac muscle

Cardiac muscles are the muscles of the heart. These types of muscles are involuntary, which means the movement of these muscles is activated automatically by the body. Our heart beats and pumps blood around the body without conscious control. 

Cardiac muscles are short, branched, and striated. Striations are lines that are visible on the muscle. Cardiac muscles also have either one or two nuclei on each fibre.

What are smooth muscles?

Smooth muscle

Smooth muscles are usually found in hollow organs such as the stomach and intestines; they are also found in blood vessels. These types of muscles are involuntary, which means the movement of these muscles is activated automatically by the body. Therefore, they contract and relax automatically to digest food or to aid the movement of blood. The food in our stomachs is digested without our conscious control. 

Smooth muscles are spindle-shaped and smooth, and they have a single nucleus on each fibre. 

What are skeletal muscles?

Skeletal muscle 

Skeletal muscles are muscles that are attached to bones. These muscles are usually attached to a tendon on the bone, for example, muscles in your arms and legs. These types of muscles are voluntary; therefore, you choose when you move your muscles. They can produce fast or slow movements. When playing a sport such as a football, we consciously move our legs to kick the ball.

Skeletal muscles are long and tubular shaped, they are striated, and they have many nuclei on each fibre. The brain, nerves and skeletal muscles all work together to cause movement in the body. Collectively, this is known as the neuromuscular system. 

Muscular problems

There are a lot of problems that can lead to muscle problems. These are known as myopathy. Myopathy can result in symptoms such as muscle weakness, paralysis, and pain. These muscle problems can be a result of genetics, inflammation, other diseases, cancer, etc. 

 

Muscular problems

There are a lot of problems that can lead to muscle problems. These are known as myopathy. Myopathy can result in symptoms such as muscle weakness, paralysis, and pain. These muscle problems can be a result of genetics, inflammation, other diseases, cancer, etc.