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Sight - 3rd natural science
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What organ do you use for sight?
eye
Eyes take in ____ and give us sight
light
what is the iris?
the colored circle at the front of the eye (it can be green, blue, brown)
what is the pupil?
the black circle in the middle of the iris, light enters the eye from the pupil
What is the retina?
layer of cells inside the eye. It also transforms the light that enters the eye into nerve signals
What do nerve signals do?
The brain receives the nerve signals and can understand what the eye is seeing
What do eyebrows and eye lashes do?
Protect eye by preventing dust and sweat from entering
What are the protective parts of the eye?
eyebrows, eyelashes, eyelids, lacrimal glands
What do lacrimal glands do?
they produce tears which keep the eye clean and moist
what do eyelids do?
spread the moisture from tears over the surface of the eye. Stop excess light from entering and damaging the eye too