question: what prevents injury by forming protective plates over the ends of the fingers?
choices.text: Cartilage keratin lamphreys protection bone broken bones weathering water vapor
choices.label: A B C D E F G H
fact2: Fingernails are also made of keratin.
combinedfact: keratin prevents injury by forming protecting plates over the ends of the fingers
formatted_question: what prevents injury by forming protective plates over the ends of the fingers? (A) Cartilage (B) keratin (C) lamphreys (D) protection (E) bone (F) broken bones (G) weathering (H) water vapor