The skin is an ________ part of your body and it’s largest ______. You have _____ layers of skin which act as a barrier _______ disease, _______ and the sun’s harmful rays. The _________ of your skin are also very _________: it keeps you ______ or cool; it prevents your body from ______ too much water;

essential

organ

three

against

poisons

warm

losing

complex

functions