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myNotes
Smell Sight Taste
4 The olfactory nerve in 5 Our eyeballs have a lens at 6 Our tongues are covered with
the nose delivers the front and a retina at tiny bumps called taste buds,
messages about smells, the back. The lens focuses or papillae (puh-pih-lee).
or aromas, to the brain. images onto the retina. When we taste something,
We can detect and The optic nerve sends the papillae send information
distinguish among those images as pieces of to the brain to identify the
seven different aromas: information to the brain. flavor. Taste buds detect four
camphor, musk, flower, The brain creates a three- different flavors: sweet, salty,
mint, ether, acrid, dimensional image that sour, and bitter. Everything
and putrid. helps us tell how close we you taste includes one or
are to objects around us. more of these flavors.
retina bitter
olfactory brain
nerve lens optic nerve
nasal cavity
sour
salt
aroma sweet
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