Stem cells are special types of cells that have some unique traits that make them different from regular cells. Here are some of those important features:

1. Longer Cell Cycle: Stem cells take more time to complete their process of growth. They have a longer G1 phase, which is the time they spend getting ready to divide. For example, blood-forming stem cells can take about 24 to 48 hours to complete their cycle.

2. Quiescence: Some stem cells can go into a resting state called quiescence, or G0 phase. This means they can stay inactive for a long time. This ability is really important for fixing tissues in our body when they are damaged.

3. Self-Renewal: Stem cells can divide in a special way. When they divide, one of the new cells stays a stem cell, while the other one starts to become a different type of cell. This process helps keep the number of stem cells just right.

4. Checkpoints: Stem cells have special checkpoints that help them make sure everything is working correctly inside the cell. About 90% of stem cells can fix any damage to their DNA effectively, keeping them healthy.

These unique traits help stem cells play a major role in helping our bodies grow and heal when we’re injured.