Muscle Tissue – Definition, Structure, Function, Types and Pictures

Definition of Muscle Tissue – Muscle tissue is a collection of muscle cells, myofibrils, and muscle fibers that help move the human body. Muscles play an active role in the movement of the human body, all movements are performed by the muscles connected to each other. See our discussion of muscle tissue material below for more details.

muscle tissue

Definition of muscle tissue

muscle tissue is a collection of muscle cells, myofibrils, and muscle fibers that help move the human body. Muscles play an active role in the movement of the human body, all movements are performed by the muscles connected to each other.

The function of muscles is also to move organs outside and inside the body. For example in the body the heart to pump blood and kidneys. Outside the body, the movement of hands, eyelids, feet and others.

Muscles play an active role in human life, especially in performing daily activities or movements. Many also train the muscles in order to be able to lift the maximum weight. Muscles can be trained for strength through muscular strength sports such as weightlifting.

Almost every organ in the body is connected to muscles. Anything that can move has its own flexible muscles. And the number is very large, until one organ has several muscles.

Structure of muscle tissue

Structure of muscle tissue

The following is an explanation of the structure of the dissection of muscle tissue from the image above:

1. Tendon

Tendons are the link between muscles and bones. Tendons have white fibers and are inelastic. Aponeuroses are flat sheets or loops of fibrous tissue designed to contain muscle groups and can also attach a muscle to the part that moves it.

2. Fascia

Fascia is a connective tissue that is a combination of fibrous and areolar tissue that can encase and bind muscles together. Each fasciculus can be separated from the connective tissue of the perimysium. Scattered satellite cells are found between the endomysium and muscle fiber bundles, which play an important role in repairing damaged muscle tissue. In certain places, such as in the palm of the hand, this fascia is very dense and strong. Examples are the palmar fascia and the plantar fascia.

3. Sarcolemma

Sarcolemma is a structural unit of muscle tissue, 0.01–0.1 mm in diameter and 1–40 mm long, covering a muscle cell. The size and amount of tissue, especially elastic tissue, increases with age. Each muscle fiber is lined with a thin elastic tissue called the sarcolemma. The protoplasm of the muscle fiber that contains the semi-liquid material is called the sarcoplasm. Within the muscle fiber matrix are embedded muscle functional units with a diameter of 0.001 mm called myofibrils.

4. Myofibril

Myofibrils are a network of fibers found in muscles. Viewed under the microscope, myofibrils look like crossed dark and light bands. The dark band (thick filament) is formed by myosin. Thin filaments are formed by actin, troponin and tropomyosin)

5. The myofilaments

Myofilaments are networks of fine threads or filaments that originate from myofibrils. There are 2 types of this tissue, namely homogeneous myofilaments and heterogeneous myofilaments (found in heart muscle/heart muscle and striated muscle.

6. Sarcoplasm

Sarcoplasm is a tissue in the form of muscle cell fluid whose function is to place myofibrils and myofilaments.

types of muscle tissue

types of muscle tissue

The following are the types of muscle tissue, as follows:

1. Smooth muscle tissue

Smooth muscle tissue is involuntary muscle tissue found in the walls of organs in the body. For example in the human digestive tract, blood vessels, respiratory, reproductive and excretory organs. Smooth muscle cannot be controlled with awareness. Because it is only innervated by the autonomic nervous system. Smooth muscle tissue works outside of body awareness with continuous movement but does not fatigue.

Its characteristics are as follows:

  • work unconsciously
  • Has a nucleus in the center of the cell
  • Transverse fine fibers are not visible
  • Responds slowly, but works tirelessly for a long time
  • The cells are spindle-shaped, tapering at both ends

2. Skeletal muscle tissue

Skeletal muscle tissue is muscle tissue that has voluntary properties associated with the skeleton. These muscles are often referred to as skeletal muscles. Working under the influence of consciousness so that the striated muscles cannot work continuously, causing them fatigue. This muscle is on the outside and can store food reserves.

Features:

  • Work consciously
  • Long cylindrical shape
  • At the end of the unbranched
  • Works fast but can cause fatigue
  • Has multiple nuclei at the edges of the cell
  • Fine fibers running through the fabric are visible

3. Cardiac muscle tissue

Cardiac muscle tissue is an involuntary tissue found only in the heart. Has a similar structure to striated muscle but has a working concept like smooth muscle. Work is for the heart beyond consciousness. The heart continuously pumps blood throughout the human body without feeling tired.

Its characteristics are as follows:

  • work unconsciously
  • Both ends are forked
  • Has a nucleus in the center of the cell
  • Cells in tissue are elongated cylindrical
  • Fine fibers running through the fabric are clearly visible
  • The work is moderate, but tireless for a long time

function of muscle tissue

  • Helps in the movement of body organs
  • Helps move the skeleton
  • Helps move heart function
  • Control the movement of the heart
  • Save food reserves, even if it’s not too much
  • Moves the digestive organs
  • body balance

Hence our discussion of the material of muscle tissue. Might be useful.

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