What Is The Function Of Muscle Cell – The muscular system is the system that includes muscle cells and muscle tissues. The human muscular system consists of specific cells called muscle fibers.

The main function of the muscular system is the motor function. By contracting muscle fibers, it helps the body perform daily activities. However, not only the human muscular system is responsible for the motor function of the body, but it is related to other organ locations in the body in other systems, e.g. with the bones of the skeletal system. Thus, the skeletal and muscular systems are integrated systems in motor functioning.

What Is The Function Of Muscle Cell

There are 600 of them in the human body and there is no difference between the female and male muscular systems in terms of the number of muscles in the body. The main muscle groups are the chest, back, shoulders, legs and arms.

Acetylcholine Receptors In Muscle Fiber (cells)

Is an organ system responsible for providing strength, maintaining balance, maintaining posture, enabling movement, and producing heat. It includes all muscle tissues such as skeletal muscle tissues, smooth muscle tissues and cardiac muscle tissues. Skeletal muscles are muscles attached to bones and responsible for voluntary body movements.

Muscle disorders may affect the muscles or the nerves and neurotransmitters surrounding the muscles. Examples of muscle diseases are multiple sclerosis, myopathy, muscular dystrophy and peripheral neuropathy.

In the muscular system, in addition to the bones of the skeletal system, there are three types of muscles. Anatomically, the organs of the muscular system are described as:

Skeletal muscles have muscle tissues associated with other various tissues such as vascular tissues, connective tissues, and neural tissues. The main difference between the muscles of the muscular system is the anatomy of each muscle fiber. This difference may be in size, with some muscles being large, such as the hamstring muscles, while others are small, such as those found in the “stapedius muscle” of the middle ear. Muscle fibers can also vary in shape, so they may be wide or narrow, in an arrangement of fibers where some are parallel to the long axis of the muscle or diagonal.

Energy Metabolism Design Of The Striated Muscle Cell

The muscular system consists of muscle fibers covered with a connective tissue sheath called the so-called

. Human muscles are divided into compartments consisting of bundles of muscle fibers. Each bundle is covered with a different connective tissue called

. The main function of the connective tissue covering the muscles is to support and protect the muscle against the force of contraction. In addition to providing a pathway for blood and nerve flow to each muscle.

The heart is one of the main muscles of the body, it consists of cardiac muscles called only cardiac muscles

How Many Muscles Are In The Human Body? Plus A Diagram

. Cardiac muscles are involuntary muscles, characterized by rhythmic contraction controlled by the sinoatrial node of the heart. Cardiac muscles consist of chains of myofibrils. Therefore, the heart muscles contract continuously. Heart cells are rectangular in shape and have only one central nucleus. They also contain lots of mitochondria, which create ATP and myoglobin, which produces and stores oxygen, which provides energy to muscles to resist fatigue. Each heart cell is covered by a barrier between its extracellular and intracellular contents called the sarcolemma.

Smooth muscles represent parts of the body’s internal organs. It occurs mainly in the digestive tract and blood vessels. The location of smooth muscle varies, as it can be found in other places such as the kidneys, genitals, and respiratory tract. Their function varies depending on location. For example, in the respiratory tract and cardiovascular system, the function of smooth muscle is to control the diameter of the bronchioles in the respiratory tract and blood flow and pressure in the cardiovascular system.

Smooth muscles are involuntary muscles that are not striated. These muscles maintain tension for a long time. The main proteins responsible for their contraction are thick, dark myosin filaments and thin, light actin filaments. Smooth muscles have a particular spindle shape because they have tapered ends. Being non-striated muscles, smooth muscles are more elastic than striated muscles. Thanks to this, they can maintain contractile tension for a long time, just like the tension of the urinary bladder.

Smooth muscle is the muscle found in the walls of the digestive tract, arteries, bladder, uterus, male and female reproductive tracts, respiratory tract, ciliary muscles, and other internal organs. Cardiac muscles are the muscles of the heart. Both skeletal and cardiac muscles are striated muscles. However, cardiac muscles are branched, forming intercalated networks. Skeletal muscles are arranged in overlapping fibers, which is why they appear striated under a microscope. Smooth muscles, on the other hand, do not have striations and appear smooth under a microscope (hence the name). The muscular system is responsible for creating movement or locomotion. Skeletal muscles enable movement or locomotion in animals (especially voluntary movements). The heart muscles are responsible for pumping blood around the heart. These muscles, along with smooth muscles, are involved in the involuntary movements of the internal organs of the body. For example, smooth muscles help blood flow through blood vessels.

Function Of Muscle Tissues

Muscle fibers are the main component of skeletal muscles. Skeletal muscles have thousands of muscle fibers connected in fascicles or fascicles.

Parts of the skeletal muscle system are attached to the bone at each end, the movable end of the muscle is connected to a place in the bone called the muscle attachment. The other end of the muscle is connected to a solid bone called the origin. During movement, many muscles participate in the same movement. But there is an essential muscle in action, which is called the prime mover. The driving force is called the agonist, there is another muscle called the synergist that helps the driving unit initiate muscle movement. A synergist can be a stabilizer that ensures bone stability. On the other hand, there are muscles that correspond to the main action of the muscle, they are called antagonists. Antagonist muscles are important for maintaining body position such as holding the arm.

Histologically, skeletal muscle consists of muscle fibers that appear as units under the microscope. Each unit consists of a fusion of single cells. They occur as elongated, cylindrical multinucleated units. The diameter of muscle fibers ranges from 10 to 100 micrometers. additionally, the fiber length can reach 35 cm. The fiber nuclei are flat and located outside the muscle fiber. Muscle sarcoplasm contains myofibrils consisting of proteins responsible for muscle contraction. Myofibrils are arranged in repeating units, forming light and dark cross-strings under the microscope.

The sarcomere is the main functional unit of the muscle. Each sarcomere is made up of two types of protein filaments called myofilaments: actin protein, which is a thin filament, and myosin, which is a thick filament. When examined microscopically, the sarcomere is divided into four bands. The stripe is a dark area composed of myosin. Band I is a lighter area composed of actin. The Z-line is a dark central line made of overlapping actin and myosin, giving the muscle a striated appearance. The H zone is brighter and located in the center of the sarcomere.

Tissues, Organs, & Organ Systems (article)

Figure 5: Muscle chart showing the muscular system marked where most of the body’s muscles are marked, in the form of a muscle map. Image source: Wikimedia.

The function of muscle tissue is mainly to move the body. However, it plays many important roles in the human body, such as:

Skeletal muscles act as levers for the body. One of the most effective examples is movements of the synovial joints. There are three forces acting on each joint: effort, fulcrum and load. Therefore, there are three types of levers depending on the three forces. The first class occurs when the effort and load are directed in the same direction and opposite to the fulcrum as the atlanto-occipital joint in the head muscles and neck muscles. The second class levers are located in the shins, when the calf raises the effort, it lifts from the gastrocnemius muscle, which is connected to the heel bone, and the effort is much greater and opposite to the load, and the distance between the load and the effort is away from the fulcrum. The third class is similar to the elbow joint, where the distance between the support point located in the elbow joint and the effort occurring at the attachment point of the “biceps” muscle is very small. Therefore, the biceps exert more effort than the calf raise to support the same weight.

Each muscle fiber is connected to neurons called somatic neurons. Neurons branch off from gray matter in the spinal cord and contain electrochemical substances called neurotransmitters. Each neuron targets a specific muscle, where the neuron’s axon enters the target muscle and the neuron branches off into small branches leading to the muscle. neuronal branches reach the center of the muscle fiber, where the axon eventually splits, leading to the formation of a cluster of terminal branches. Each terminal axon has neurotransmitters released to the neuromuscular junction, which is the distance between the muscle and

Sliding Filament Model Of Muscle Contraction: Video

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