What prevents injury by forming protective plates over the ends of the fingers.
blood bone Cartilage lamphreys treatment keratin helmets Porifera
A B C D E F G H
Fingernails are also made of keratin.
Keratin prevents injury by forming protective plates over the ends of the fingers.
What prevents injury by forming protective plates over the ends of the fingers. (A) blood (B) bone (C) Cartilage (D) lamphreys (E) treatment (F) keratin (G) helmets (H) Porifera