Contractile ring

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 The contractile ring consists mainly of <a href="https://teaching.ncl.ac.uk/bms/wiki/index.php/Actin">actin filaments</a> and <a href="https://teaching.ncl.ac.uk/bms/wiki/index.php/Myosin">myosin</a> filaments. It is found arranged in a ring around the equator of the cell and plays a key role during <a href="https://teaching.ncl.ac.uk/bms/wiki/index.php/Cytokinesis">cytokinesis</a>. Towards the end of <a href="https://teaching.ncl.ac.uk/bms/wiki/index.php/Mitosis">mitosis</a>, it starts to assemble just beneath the <a href="https://teaching.ncl.ac.uk/bms/wiki/index.php/Plasma_membrane">plasma membrane</a>. As the ring contracts, it pulls the membrane inward;dividing the <a href="https://teaching.ncl.ac.uk/bms/wiki/index.php/Cell">cell</a> in two. 

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