1. SENSE ORGANS
Structures that carry messages about your surroundings to the Central Nervous System
Eyes, ears, nose, tongue, skin

2. SCLERA
Outer protective layer of the eye
“White of the eye”

3. CORNEA Transparent protective covering of the eye Light enters
“Window of the eye”

4. AQUEOUS HUMOR
Fluid-filled chamber behind the cornea

5. IRIS
Circular, colored part of the eye

6. PUPIL
Small opening in the middle of the iris through which light enters

7. LENS
Focuses light rays entering the eye
Behind the iris

8. VITREOUS HUMOR
Large chamber behind the lens that gives the eyeball its roundish shape
Filled with jelly-like fluid

9. RETINA Back surface of the eye that focuses light a second time
Contains light sensitive cells called RODS and CONES

10. RODS AND CONES... Rods react to dim light
Cones are responsible for color vision

11. ON THE RETINA...
The image appears upside down. (lens bends light rays entering the eye)
The brain must automatically turn the image right-side up quickly.

12. LIGHT THROUGH THE EYE
Cornea, aqueous humor, pupil, lens, vitreous humor, retina, optic nerve, cerebrum

13. SOUND TRAVELS...
Outer Ear, auditory canal, eardrum, hammer, anvil, stirrup, cochlea (liquid), auditory nerve to the cerebrum

14. BALANCE...
When the fluid in the semicircular canals moves as the body moves, the cilia bend.
Cilia send nerve impulses to the cerebellum so that the brain can signal you to catch your balance.

15. TASTE RECEPTORS...
Found in the taste buds on your tongue

16. KINDS OF TASTES...
Sweet Sour
Bitter Salty

17. LARGEST SENSE ORGAN
The skin

18. SENSE RECEPTORS IN THE SKIN...
Pressure
Touch
Pain
Heat
Cold