What do mammals contain?
food ghosts keratin Animal fur magic soul alveoli four limbs
A B C D E F G H
Hair is largely made of keratin, a protein that contains a lot of the amino acid cystine .
mammals contain keratin
What do mammals contain? (A) food (B) ghosts (C) keratin (D) Animal fur (E) magic (F) soul (G) alveoli (H) four limbs