20. Why is iodine important
for human beings?

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
is a fundamental chemical
element for the proper functioning of
the since itis part of the
hormones produced by this gland.
Iodine deficiency creates a kind of
hypothyroidism, a disease known as
goiter.