People's joys and sorrows, birth and death are closely related to the life activities in cells.

The activity of cells proves the continuation of life activities.

But sometimes people die before the cells come, and everyone dies.

Cells can still survive.

Without the activity of cells, there is no complete life activity.

Because human life activities are inseparable from cell proliferation, differentiation, aging and apoptosis, cell life activities are the basis of life.