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vendredi 3 janvier 2020

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The concept of muscle

The concept of muscles refers to a posh network of sentimental tissues that exist throughout the physical body, and therefore, therefore, the muscles within the physical body have many functions and the most vital ones are movements, where the skeletal muscles within the physical body are associated with the skeleton that moves by moving the bones, and therefore the second function is to regulate movement, where Some muscles are intricately linked with the skeleton and this helps the body to require certain positions like standing and sitting, and therefore the muscles play an important role in maintaining the traditional blood heat, which is 37 degrees Celsius.

Muscle properties

  • Contraction: one of the foremost prominent properties of muscles is that they contract strongly with one another, which helps them contract easily, additionally to giving the body an excellent pulling force.
  • Stretch: Muscle tissues allow the body to stretch any organ of the body.
  • Flexibility: Post-stretch muscles are often easily folded and simply grasped.
  • Irritability: These are signals and factors that stimulate muscle cells to release electrical impulses that follow the cell wall in cells. These impulses stimulate muscle cells to contract one another.

Muscle structure

Sarcoplasma

Bones cover fleshy muscles, each of which creates cell bundles, and every cell bundle is named muscle cell, which consists of sarcoplasm, which may be a cell wall that surrounds the protoplasm connected from both ends with animal tissue. This tissue is named the inner muscle, and every group of muscle fibers is surrounded by a membrane that separates it from other Muscle groups, and another muscle that surrounds the muscle, is surrounded by muscle. Its function is to scale back muscle friction during movement.

Motor unit

It is the functional unit of the muscle, and it consists of: a neuron, the nerve fibers that get its food from the cell, and therefore the nerve whose body is found within the central systema nervosum, and a medial axis from it enters the muscle with a gaggle of other nerve axes, and after reaching the muscle it comes out of The neuron has additional branches, in order that each muscle cell features a nerve fiber that feeds it. The nerve fiber ends during a motor plate somewhat almost like the electrode, and these plates transfer the neurotransmitter effects from the nerve fiber to the sacroplasma.

Muscle types

The physical body contains 600 muscles distributed throughout the body, and that they constitute 40% of the entire general weight. Muscles have several types, including:

  • Voluntary muscles: the muscles that an individual controls, like moving the top and moving the hands.
  • Involuntary muscles: they're the muscles that move without effort from an individual, that is, they receive orders from the central systema nervosum, like generating the warmth necessary to warm the body.
  • Cardiac muscles: These are muscles that employment in both the involuntary and involuntary directions, and that they are the foremost important muscle within the physical body, because it is that the first and last liable for his life.

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