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HW # 34 - Writing in Science (type if you can) Due Tuesday Warm up

Week 9, Day Three. HW # 34 - Writing in Science (type if you can) Due Tuesday Warm up Name as many parts of the eye as you can. -. Warm up Response. W. Homework Response/Check. Read your neighbor ’ s “ CYFTD ” lab conclusion.

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HW # 34 - Writing in Science (type if you can) Due Tuesday Warm up

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  1. Week 9, Day Three HW # 34- Writing in Science (type if you can) Due Tuesday Warm up Name as many parts of the eye as you can. -

  2. Warm up Response W

  3. Homework Response/Check Read your neighbor’s “CYFTD” lab conclusion. Give them some feedback (2 warm and 1 cool).

  4. Goals for Today • Eyes

  5. The Human Eye! Window to the world!

  6. 7 main parts of the eye Sclera • Cornea • Iris • Pupil • Lens • Sclera • Retina • Optic Nerve Cornea Retina Iris Pupil Lens Optic Nerve

  7. FYI:Look closely at the eye:

  8. Sclera • White of the eye • Covers whole outside of eye • Tough protective outer layer

  9. Cornea • Clear • Covers iris • Allows light to enter • Protects • Focuses Image to help make image clear (ex: coarse adjustment knob) • This is where sclera becomes a clear window for the eye

  10. 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

  11. Pupil • Hole in center of iris • Lets light waves into eye • Adjusts in size to light levels • Light entering shines on retina

  12. Lens • Behind iris/pupil • Focuses light waves (ex: fine adjustment knob) • Makes images clear (See next slide for clear picture of lens)

  13. Check out the eye

  14. Vitreous Humor • Jelly-like fluid that fills most of the eye (from the lens back) • Helps the eye hold it’s sphere shape

  15. Retina • Back of the eye where light shines • Like a movie screen • Shows us what we see by sending information to the optic nerve.

  16. An Actual Retina!!! • 2 kinds of cells in the retina: • Cones--see color • Rods--see form and shape

  17. TapetumLucidum • Shiny blue-green color • Reflects lights to allow more light to the retina • Allows for better vision in dark environments

  18. Optic Nerve • Sends information from the eye to the brain • Thick cord at lower back of eye

  19. Diagram of the eye:Very dry…

  20. Can you identify the structures now???

  21. 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.

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