It is oberved that heart cells do not exhibit cell division. Such cells do not divide further and exit... Phase to enter an inactive stage called.... of cell cycle. Fill in the blanks

Explanation

It is observed that heart cells do not exhibit cell division. Such cells do not divide further and exit `G_(1)` phase to enter an inactive stage called quiescent stage `(G_(0))` of cell cycle.
Muscle cells when a level of maturity, no loner divide and just perform their function all thrugh its life. Similar is the case with nerve cells too which are highly specific and lack the ability to divide once they get specialised. They remain in that state until they die.