A contractile ring is made up of actin filaments that constrict like a drawstring to fully divide the cytoplasm.
In biology, a contractile ring is formed during the cytokinesis process.
Generally, it is also called actomyosin because it composed of actin filaments and motor protein called myosin-2.
In a cell, it is present just below the plasma membrane and is formed along the cell's equator.
At the time of cell division, contraction occur in the contractile ring just at the equator and plasma contracts inward giving rise to a cleavage furrow that is responsible for splitting the cytoplasm.
Simply put, a contractile ring is responsible for cell division as it contracts and divided the singular cell into two.
If you need to learn more about cytoplasm click here:
https://brainly.com/question/174023
#SPJ4