In addition to the immune system, we are protected from disease by

0 votes
    the skin
    mucous membranes
    natural secretions such as acids, protein-digesting enzymes, and antibiotics
    cilia
    all of the above

asked May 30, 2013 in Biology by anonymous
    

1 Answer

0 votes
all of the above
answered May 31, 2013 by Bioshare ~Top Expert~ (34,070 points)



...