'These identifying ridges on the hands are visible on human fetuses at about 4 months'
fingerprints
THE HUMAN BODY: These identifying ridges on the hands are visible on human fetuses at about 4 months
These identifying ridges on the hands are visible on human fetuses at about 4 months
These identifying ridges on the hands are visible on human fetuses at about 4 months
THE HUMAN BODY
fingerprints
THE HUMAN BODY