His body is very healthy.

He made three robots.

He exercises his body every day.

His body looks like that of an athlete.

I maintain my health by doing aerobic exercises every day.

The activity of brain cells directly affects our thoughts and actions.

Cytology is a branch of biology that studies the structure and function of cells.

Stem cell research is opening up new frontiers in medicine.

The cell nucleus holds genetic information.

The cell membrane plays an important role in maintaining the structure of the cell.