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Fis forFingernail
Your fingernails are the hard parts on the back of your fingertips. Your fingernails protect the ends of your fingers from getting damaged. Some people grow their fingernails very long, and paint them in pretty colors.
Fis forFingerprint
If you look closely at the ends of your fingers you will be able to see lots of small lines in your skin. Whenever you touch something, the oil on your skin means you leave a mark of these lines, called a fingerprint. Everyone has different fingerprints, and at a crime scene the police will be looking for fingerprints so they can try and find out who was there.