    Teeth chop food into small pieces, which         Tongue
     are moistened by saliva before the tongue
     and other muscles push the food into the            It is a fleshy and muscular sensory organ,
     pharynx.                                             and the very first sensory information is
                                                          received via the taste buds on its surface.
Teeth                                                    It also helps to push food toward the
                                                          posterior part of the mouth for
    Teeth are made of a bone-like material               swallowing.
     called dentin, which is covered by the              The outside of the tongue contains many
     hardest tissue in the body enamel.                   rough papillae for gripping food as it is
    The number of teeth in an adult person is            moved by the tongue’s muscles.
     32.                                                 The taste buds on the surface of the tongue
    It designed for cutting and grinding food            detect taste molecules in food and connect
     into smaller pieces.                                 to nerves in the tongue to send taste
                                                          information to the brain.
                                                      Salivary Glands
                                                         It produces a watery secretion known as
                                                         It helps to moisten food and begins the
Incisors are the teeth in the very front.                 digestion of carbohydrates.
They’re the sharpest teeth, built to cut food            The body also uses saliva to lubricate food
and shaped to shovel the food inward.                     as it passes through the mouth, pharynx,
                                                          and esophagus.
Canine teeth are in the corners of your mouth.
Because they’re meant for grasping and                Pharynx (throat)
tearing food, they have very long roots.
                                                         It is a funnel shaped tube connected to the
Premolars are located just behind your                    posterior end of the mouth.
Canine teeth. Premolars have a more flat                 It helps in passing chewed food from the
chewing surface because they’re meant for                 mouth to the esophagus.
crushing food.                                           Air from the nasal cavity passes through
                                                          the pharynx on its way to the larynx and
Molars are the last teeth towards the back of
                                                          eventually the lungs.
your mouth. Molars are much bigger than the
Premolars and have bigger, flatter chewing
surfaces because their job is to chew and grind
the food into smaller pieces.