HW # 34 - Writing in Science (type if you can) Due Tuesday Warm up
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Transcript of HW # 34 - Writing in Science (type if you can) Due Tuesday Warm up
HW # 34- Writing in Science (type if you can) Due Tuesday
Warm up
Name as many parts of the eye as you can.-
Week 9, Day Three
Warm up Response
W
Homework Response/CheckRead your neighbor’s “CYFTD” lab conclusion.
Give them some feedback (2 warm and 1 cool).
•Eyes
The Human Eye!
Window to the world!
7 main parts of the eye
Cornea
Iris
Pupil
Lens
Sclera
Retina
Optic Nerve
Pupil
Lens
Iris
Cornea
Retina
Optic Nerve
Sclera
FYI:Look closely at the eye:
Sclera
White of the eye
Covers whole outside of eye
Tough protective outer layer
Cornea
ClearCovers irisAllows light to enterProtectsFocuses Image to help make image clear (ex: coarse adjustment knob)This is where sclera becomes a clear window for the eye
Iris
Colored part of eye
Muscles open and close pupil
Lighter colored iris lets in more light
Darker colors protect more, less light enters eye
Pupil
Hole in center of iris
Lets light waves into eye
Adjusts in size to light levels
Light entering shines on retina
Lens
Behind iris/pupil
Focuses light waves (ex: fine adjustment knob)
Makes images clear
(See next slide for clear picture of lens)
Check out the eye
Vitreous Humor
Jelly-like fluid that fills most of the eye (from the lens back)
Helps the eye hold it’s sphere shape
Retina
Back of the eye where light shinesLike a movie screenShows us what we see by sending information to the optic nerve.
An Actual Retina!!!
2 kinds of cells in the retina:Cones--see color
Rods--see form and shape
Tapetum Lucidum
Shiny blue-green color
Reflects lights to allow more light to the retina
Allows for better vision in dark environments
Optic Nerve
Sends information from the eye to the brain
Thick cord at lower back of eye
Diagram of the eye:Very dry…
Can you identify the structures now???
Facts! Eyes…..
-Are the most complex organs in the body second to the brain.
-Contribute to 80% of your total knowledge
-Are composed of more than 2 million working parts
-During a normal life will bring in 24 million images of the world around you
-The adult eye measures about one inch in diameter (2.5 cm), but only one sixth of the
area is exposed on the front.