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Every species has a sense they rely on most.

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Every species has a sense they rely on most.

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Human rely on vision more than any other sense.

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Light enters through the cornea.

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An area at the base of your forebrain where your optic nerves cross and carry info to the brain.

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The eye is sensitive to only a small segment of the spectrum known as visible light.

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Electromagnetic Spectrum Song. Here is a video I created for my 6th grade science students﻿ to help them study.I hope you enjoy. Mr. Worldwide C.Parr So listen up Here we go (La, la, la) Electromagnetic Spectrum, So here we go (La, la, la...) Electromagnetic Spectrum, So here we go (La, la, la...)

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Pupil-a small opening in the iris through which light enters the eye

Iris- The colored part of the eye

Cornea- The transparent protective coating over the front part of the eye.

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The left visual field travels to the right optical lobe. the right visual field travels to the left optical lobe

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the rate of automobile accidents have gone up because the changing conditions do not allow complete adaptation of either rods or cones so people cannot focus on location of an object.

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point of entry of the optic nerve on the retina, insensitive to light.

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The retina of each eye contains receptor cells.

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6 million cones 120 million rods

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pupils expand.
During the day the pupils dilate.

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cats have far more rods than humans.

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ability to distinguish the details visually.

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process by which our senses adjust to different levels of stimulation.

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sensitivity of rods and cones changes according to how much light is available.

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rods and cones become more sensitive to light.

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the rods and cones become less sensitive to light.

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occurs after a visual stimulus has been removed.

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partial, back-and-forth kind of experience.

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Rods and cones are connected to bipolar cells in different numbers and combinations.

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Sets of neurons, interneurons, link receptor cells to another and bipolar cells to another.

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Bipolar cells hook up with ganglion cells, leading out the eye.

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Axons of ganglion cells join to form the optic nerve, which carries messages from each eye to the brain.

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Each retina has about 100 million rods and cones.

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Optic nerve has about 1 million ganglion cells.