Skeletal Muscle, This muscle is highly specialised to provide rapid and powerful contraction for movement and locomotion. It is striated and voluntary (under the control of the will)., The fibres are cylindrical in shape and range in length, Age, testosterone and exercise can change he diameter of the fibres but usually fibres within the same muscle are equal in diameter., Cardiac Muscle, This muscle comprises the myocardium of the heart and resembles both types of muscle., Cardiac muscle consists of a network of branching fibres with centrally located nuclei and it has intercalated discs between the fibres., Functionally, the discs not only hold the fibres together but also permit the rapid spread of impulses, allowing the cardiac muscle fibres to contract smoothly and rhythmically, as in the heartbeat., Smooth Muscle, This muscle is the least specialised of the three varieties of muscle., The cells are spindle-shaped, non-striated and involuntary, They are found in the wall of hollow organs or viscera (except the heart), such as in the gastrointestinal tract, uterus, urinary bladder and blood vessels.

Muscles

looja
Prindi
Manusta

Edetabel

Visuaalne stiil

Valikud

Vaheta malli

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