2. What are Sense Organs?
• They are a part of your body, such as
your eyes, nose, ears, skin, and
tongue.
• We use them to perceive the world
around us.
3. Sense of Sight
The eyes allow us to:
• see and interpret new information
• identify color
• judge depth
Fun fact:
• There are people with different colored eyes.
4. Parts of the Eye
• Cornea: the transparent window
• Pupil: where light enters the eye
• Iris: colorful part of the eye
• Lens: helps focus images onto the
retina
• Sclera: eyeball’s outer coat
5. Parts of the Eye
• Retina: changes the images into
nerve signals.
• Cones: there are 7 million color
detecting cones
• Rods: there are 120 million light
detecting rods
6. Parts of the Eye
• Retina: changes the images into
nerve signals.
• Macula: oval-shaped pigmented
area near the center of the retina
specialized in high resolution
images
• Optic Disk: optic nerve head
• Optic Nerve: connects the eye to
the brain
7. Sense of Smell
The nose allows us to:
• perceive scents
• cleans the air we breathe
• impacts the sound of our voice
Fun fact:
• The smell is connected to taste and memory.
8. Parts of the Nose
• Nostril: each hole of the nose
• Nasal Cavity: space behind the
nose
• Cilia: tiny hairs that pick up odor
molecules in the air.
9. Parts of the Nose
• Olfactory Bulb: receives neural
input about odors
• Hard Palate: Separates the nasal
and oral cavities
• Soft Palate: closes the nasal
cavity from the oral cavity when
swallowing
10. Sense of Hearing
The ears allow us to:
• listen to sounds
• perceive vibrations
Fun Fact:
• The Inner Ear is also responsible of balancing
the body.
11. Parts of the Ear
• Ear Lobe/Outer Ear: collects
sounds
• Ear Canal: sound passes
through it
• Ear Drum: transforms sounds
into vibrations
12. Parts of the Ear
• Middle Ear: transports the
vibrations to the Inner Ear
• Inner Ear: transforms vibrations
into signals for the brain
13. Sense of Taste
The tongue allows us to:
• perceive flavors
• sense the temperature of things
Fun Facts:
• The tongue is one of the strongest muscles in the
body.
• If you close your nose, you won’t be able to taste.
14. Parts of the Tongue
• The surface of the tongue is made up
of about ten thousand taste buds.
• Our taste buds detect only five
chemical stimuli: sweet, bitter, sour,
salty and umami (salts of certain acids
that are associated with savory flavors).
umami
15. Sense of Touch
The skin allows us to:
• perceive textures
• feel temperature
Fun Fact:
• It is the largest sense organ because it is located
around the entire body.
16. The Skin
• The skin can:
• sense cold, heat, contact, and
pain with different kinds of
receptors
• feel if things are bumpy,
rough, hard, soft, or smooth.
• regulate temperature by
sweating
17. The Skin
• The skin can:
• protect our body from
bacteria and fungi
18. Summary
The brain:
• receives and interprets the
information sent by the sense
organs
• takes decisions from the
information gathered by these
organs