it is observed 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.

Explanation

**Step-by-Step Text Solution:**

1. **Understanding Cell Division**: Heart cells are specialized cells that do not undergo cell division. This is an important characteristic of certain types of cells in the body.

2. **Exit from the Cell Cycle**: These heart cells do not continue through the normal phases of the cell cycle, which typically includes G1, S, G2, and M phases. Instead, they exit the G1 phase.

3. **Entering the Inactive Stage**: After exiting the G1 phase, these cells enter an inactive stage of the cell cycle. This stage is known as the G0 phase.

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