iv) The alveolar ridge is between the top front teeth and the hard palate. You can
feel its shape with your tongue. Its surface is really much rougher than it feels,
and is covered with little ridges. You can only see these if you have a mirror small
enough to go inside your mouth, such as those used by dentists. Sounds made
with the tongue touching here (such as t, d, n) are called alveolar.