Question

Can anyone explain contraction of muscles? ​

Answer 1

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$\sf{\underline{Contraction\:of\:muscles:}}$

The sliding filament theory explains the process of muscle contraction,


$\sf{\underline{During\:muscle\:contraction,}}$

The myosin heads or cross bridges come in close contact with the thin filaments.


$\sf{\underline{As\:a\:result,}}$

The thin filaments are pulled towards the middle of the sarcomere. 


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Answer 2

$\huge\bf\mathscr\pink{Your\: Answer}$

♠ CONTRACTION OF MUSCLES

♥It is the process of force-generationin the fibres of any class of muscle, by the interaction of myosinhead-groups in the thick filaments with actin molecules in one of the immediately neighbouring thin filaments.

♥ This is set in train ('activated') by a rise in the concentration of calcium ions [Ca2+] in the muscle fibre cytoplasm in all types of muscle, but the mechanism for this rise differs in important respects between them.

♥ With reference to skeletal muscle, 'contraction', though literally implying shortening, is used to describe force-generation,

♥ Whether it actually results in shortening (concentric action),

♥ Tension without movement (isometric action)

♥ or Even lengthening against the muscle's own resistance (eccentric action);

♥The last is sometimes called an 'eccentric contraction' or, a 'lengthening contraction' - paradoxical usages better avoided.