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The muscular system is an organ system consisting of skeletal, smooth, and cardiac muscle. It permits movement of the body, maintains posture, and circulates blood throughout the body. [ 1 ] The muscular systems in vertebrates are controlled through the nervous system although some muscles (such as the cardiac muscle ) can be completely autonomous.
The muscular system in vertebrates consists of three different types of muscles: cardiac, skeletal and smooth. Cardiac muscle is a striated muscle that makes up the heart. It is the only type of muscle consisting of branching fibers. Skeletal muscle consists of voluntary muscles attached to the frame of the skeletal system enabling bodily movement.
ophthalmic artery, lateral muscular branch trochlear nerve [CNIV] abducts, intorts, and depress eye: right medial, superior, and inferior recti (superior and inferior oblique muscles are the synergists) 2 1 oblique, inferior: head, extraocular (left/right) orbital surface of maxilla, lateral to lacrimal groove
The human musculoskeletal system (also known as the human locomotor system, and previously the activity system) is an organ system that gives humans the ability to move using their muscular and skeletal systems. The musculoskeletal system provides form, support, stability, and movement to the body.
Striated or skeletal muscle only contracts voluntarily, upon the influence of the central nervous system. Reflexes are a form of non-conscious activation of skeletal muscles, but nonetheless arise through activation of the central nervous system, albeit not engaging cortical structures until after the contraction has occurred. [citation needed]
[65] [66] Anatomy advanced further with the invention of the microscope and the study of the cellular structure of tissues and organs. [67] Modern anatomy uses techniques such as magnetic resonance imaging, computed tomography, fluoroscopy and ultrasound imaging to study the body in unprecedented detail. [68]
In the neuromuscular system, nerves from the central nervous system and the peripheral nervous system are linked and work together with muscles. [3] Synaptic transmission at the neuromuscular junction begins when an action potential reaches the presynaptic terminal of a motor neuron , which activates voltage-gated calcium channels to allow ...
Movement demands include strength, endurance and range of motion. Training oversights occurs when the body is overused. [9] Internally, the joints, muscles, tendons, and ligaments can affect one's flexibility. As previously mentioned, each part of the body has its own limitations and combined, the range of motion can be affected.