Check this site.
http://www.enchantedlearning.com/subjects/invertebrates/mollusk/gastropod/Slugprintout.shtml
Is it a breathing hole?
Does a slug breathe through gills, lungs or breathing hole?
we think breathing hole, please can someone tell us if we are right?
Thanks
4 answers
we have checked the link, does air hole mean the same as breathing hole?
Yes. Air hole and breathing hole are the same.
slugs have a breathing hole.it opens and closes as the slug travels along its moist slime.